помогите пожалуйста,алгебра 7 класс. Created by tanyastvkova. algebra-ru

1)домножим на10:2х-5х=-30-3х=-30х=102)3а^2+6а-(а^2+6а+9)=3а^2+6а-а^2-6а-9=2а^2-9=2*(-5)^2-9=413)А)81х^3-х=х(81х^2-1)=х(9х-1)(9х+1)б)3у^2-30у+75=3(у^2-10у+25)=3(у-5)^24)пусть х-двухместныеу-трехместные{х+у=6;{2х+3у=14.домножим первое уравнение на 2 и решим способом сложения(вычитания):{2х+2у=12{2х+3у=14-у=-2у=2подставим значение в любое из уравнений:х+2=6х=45)у-у0=к(х-х0)у-8.2=3.6(х+0.5)у-8.2=3.6х+1.8у=3.6х+10проверка:8.2=3.6*(-0.5)+108.2=8.2Вроде верно Реклама Реклама Новые вопросы в Алгебра 1.[1 балл] Определите коэффициент и степень 1/6 1) H5 2) 5/6 5 3) 5/6 б 4) 5 и 5 4Pi * e * H * a * (5x ^ 5 * y)/6 Упростите выражение: ПОЖАЛУЙСТА, СПАСИБО ТЕМ КТО ОТВЕТИТ 2. Представьте в виде дроби ОТДАЮ ВСЁ ЧТО ЕСТЬ ПОМОГИТЕ!!!! албебра помогите пжпж 50 баллов При каком наименьшем натуральном число !=1⋅2⋅…⋅ делится на 2 600 000? решите пожалуйста !!!! 60 балов Пожалуйста очень нужно помогите! Фото Знайдіть область визначення функції: а) у = 2х – 10;б) у = 2,5 – х. Знайдіть об'єднання та переріз проміжків: a) (4; 7] i [-1; 5); б) (-∞; 1] i (0; +∞) Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. КОМПАНИЯ О нас Блог Карьера Условия пользования Авторское право Политика конфиденциальности Политика использования файлов cookie СООБЩЕСТВО Сообщество Brainly Brainly для школ и учителей Сообщество родителей Кодекс чести Правила сообщества Brainly Insights Стань помощником ПОМОЩЬ Зарегистрируйся Центр помощи Центр безопасности Договор о конфиденциальности полученной информации Установи приложение Brainly Скачай iOS-приложение Скачай для Android Школьные Знания.com PL: Brainly.pl ES: Brainly.lat PT: Brainly.com.br FR: Nosdevoirs.fr TR: Eodev.com RO: Brainly.ro ID: Brainly.co.id HI: Brainly.in PH: Brainly.ph US: Brainly.com (function() { window.jsData = window.jsData || {}; window.jsData.domain = 'znanija.com'; window.jsData.dateFormat = 'd.m.Y'; window.jsData.styleGuideAssets = { logo: { small: 'https://styleguide.znanija.com/images/logos/znanija-mobile-200611d052.svg', big: 'https://styleguide.znanija.com/images/logos/znanija-addd85e6f5.svg', plusSmall: 'https://styleguide.znanija.com/images/logos/znanija-plus-small-495ddebd8c.svg', plus: 'https://styleguide.znanija.com/images/logos/znanija-plus-337423fa26.svg' } }; window.jsData.staticDomain = 'z-dn.net' window.jsData.adsEnabled = true window.jsData.pubmaticAllowedForIp = false window.jsData.userLocationInfo = {"location":{"continent":{"code":"EU","geoname_id":6255148,"names":{"de":"Europa","en":"Europe","es":"Europa","fr":"Europe","ja":"\u30e8\u30fc\u30ed\u30c3\u30d1","pt-BR":"Europa","ru":"\u0415\u0432\u0440\u043e\u043f\u0430","zh-CN":"\u6b27\u6d32"}},"country":{"geoname_id":2017370,"iso_code":"RU","names":{"de":"Russland","en":"Russia","es":"Rusia","fr":"Russie","ja":"\u30ed\u30b7\u30a2","pt-BR":"R\u00fassia","ru":"\u0420\u043e\u0441\u0441\u0438\u044f","zh-CN":"\u4fc4\u7f57\u65af"}},"location":{"accuracy_radius":1000,"latitude":55.738599999999998,"longitude":37.6068,"time_zone":"Europe\/Moscow"},"registered_country":{"geoname_id":2017370,"iso_code":"RU","names":{"de":"Russland","en":"Russia","es":"Rusia","fr":"Russie","ja":"\u30ed\u30b7\u30a2","pt-BR":"R\u00fassia","ru":"\u0420\u043e\u0441\u0441\u0438\u044f","zh-CN":"\u4fc4\u7f57\u65af"}}},"ip":"85.249.25.28"} window.jsData.isTrustArcAllowedForIp = true window.jsData.paymentsMode = '0'; window.jsData.styleGuideUrl = 'https://styleguide.znanija.com/'; window.jsData.androidAppUrl = 'https://play.google.com/store/apps/details?id=co.brainly&hl=ru'; window.jsData.iOSAppUrl = 'https://apps.apple.com/ru/app/id745089947'; // brainly store items window.jsData.subjects = [{"id":59,"name":"\u0423\u0445\u043e\u0434 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","slug":"uhod_za_soboi","icon":"personal-care","bestInName":"\u0423\u0445\u043e\u0434\u0435 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","filterName":"\u0423\u0445\u043e\u0434 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","occupants":0,"rankable":"1","enabled":false},{"id":29,"name":"\u041c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0430","slug":"matematika","icon":"mathematics","bestInName":"\u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0435","filterName":"\u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":17,"name":"\u041b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0430","slug":"literatura","icon":"literature","bestInName":"\u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","filterName":"\u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":30,"name":"\u0410\u043b\u0433\u0435\u0431\u0440\u0430","slug":"algebra","icon":"algebra","bestInName":"\u0430\u043b\u0433\u0435\u0431\u0440\u0435","filterName":"\u0430\u043b\u0433\u0435\u0431\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":16,"name":"\u0420\u0443\u0441\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"russkii_yazyk","icon":"russian-alt","bestInName":"\u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":31,"name":"\u0413\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u044f","slug":"geometriya","icon":"geometry","bestInName":"\u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438","filterName":"\u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":33,"name":"\u0410\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"angliiskii_yazyk","icon":"english","bestInName":"\u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":10,"name":"\u0425\u0438\u043c\u0438\u044f","slug":"himiya","icon":"chemistry","bestInName":"\u0445\u0438\u043c\u0438\u0438","filterName":"\u0445\u0438\u043c\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":9,"name":"\u0424\u0438\u0437\u0438\u043a\u0430","slug":"fizika","icon":"physics","bestInName":"\u0444\u0438\u0437\u0438\u043a\u0435","filterName":"\u0444\u0438\u0437\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":3,"name":"\u0411\u0438\u043e\u043b\u043e\u0433\u0438\u044f","slug":"biologiya","icon":"biology","bestInName":"\u0431\u0438\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u0431\u0438\u043e\u043b\u043e\u0433\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":42,"name":"\u0414\u0440\u0443\u0433\u0438\u0435 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u044b","slug":"drugie_predmety","icon":"others","bestInName":"\u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u0430\u0445","filterName":"\u0414\u0440\u0443\u0433\u0438\u0435 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u044b","occupants":0,"rankable":"1","enabled":true},{"id":13,"name":"\u0418\u0441\u0442\u043e\u0440\u0438\u044f","slug":"istoriya","icon":"history","bestInName":"\u0438\u0441\u0442\u043e\u0440\u0438\u0438","filterName":"\u0438\u0441\u0442\u043e\u0440\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":15,"name":"\u041e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u0435","slug":"obshtestvoznanie","icon":"social-science","bestInName":"\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u044e","filterName":"\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u044e","occupants":0,"rankable":"1","enabled":true},{"id":46,"name":"\u041e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0438\u0439 \u043c\u0438\u0440","slug":"okruzhayushtii_mir","icon":"environment","bestInName":"\u043e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0435\u043c \u043c\u0438\u0440\u0435","filterName":"\u041e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0438\u0439 \u043c\u0438\u0440","occupants":0,"rankable":"1","enabled":true},{"id":8,"name":"\u0413\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u044f","slug":"geografiya","icon":"geography","bestInName":"\u0433\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u0438","filterName":"\u0433\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":37,"name":"\u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430 \u043c\u043e\u0432\u0430","slug":"ukrainsyka_mova","icon":"ukrainian-alt","bestInName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":32,"name":"\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0430","slug":"informatika","icon":"informatics","bestInName":"\u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0435","filterName":"\u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":41,"name":"\u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430 \u043b\u0456\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0430","slug":"ukrainsyka_l_teratura","icon":"ukrainian-literature","bestInName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u0439 \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","filterName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u0439 \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":44,"name":"\u049a\u0430\u0437\u0430\u049b \u0442i\u043bi","slug":"kazak_tili","icon":"kazach-alt","bestInName":"\u043a\u0430\u0437\u0430\u0445\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u043a\u0430\u0437\u0430\u0445\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":22,"name":"\u042d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0430","slug":"ekonomika","icon":"economics","bestInName":"\u044d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0435","filterName":"\u044d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":48,"name":"\u041c\u0443\u0437\u044b\u043a\u0430","slug":"muzyka","icon":"music","bestInName":"\u043c\u0443\u0437\u044b\u043a\u0435","filterName":"\u041c\u0443\u0437\u044b\u043a\u0430","occupants":0,"rankable":"1","enabled":true},{"id":25,"name":"\u041f\u0440\u0430\u0432\u043e","slug":"pravo","icon":"law","bestInName":"\u043f\u0440\u0430\u0432\u0435","filterName":"\u041f\u0440\u0430\u0432\u043e","occupants":0,"rankable":"1","enabled":true},{"id":49,"name":"\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f","slug":"tehnologiya","icon":"technology","bestInName":"\u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f","occupants":0,"rankable":"1","enabled":false},{"id":43,"name":"\u0411\u0435\u043b\u0430\u0440\u0443\u0441\u043a\u0430\u044f \u043c\u043e\u0432\u0430","slug":"belaruskaya_mova","icon":"belarus-alt","bestInName":"\u0431\u0435\u043b\u043e\u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0431\u0435\u043b\u043e\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":47,"name":"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"francuzskii_yazyk","icon":"french","bestInName":"\u0444\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","occupants":0,"rankable":"1","enabled":true},{"id":45,"name":"\u041d\u0435\u043c\u0435\u0446\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"nemeckii_yazyk","icon":"german","bestInName":"\u043d\u0435\u043c\u0435\u0446\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u041d\u0435\u043c\u0435\u0446\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","occupants":0,"rankable":"1","enabled":true},{"id":50,"name":"\u0427\u0435\u0440\u0447\u0435\u043d\u0438\u0435","slug":"cherchenie","icon":"geometry","bestInName":"\u0447\u0435\u0440\u0447\u0435\u043d\u0438\u0438","filterName":"\u0427\u0435\u0440\u0447\u0435\u043d\u0438\u0435","occupants":0,"rankable":"1","enabled":false},{"id":51,"name":"\u041c\u0425\u041a","slug":"mhk","icon":"art","bestInName":"\u041c\u0425\u041a","filterName":"\u041c\u0425\u041a","occupants":0,"rankable":"1","enabled":true},{"id":52,"name":"\u041e\u0411\u0416","slug":"obzh","icon":"security","bestInName":"\u041e\u0411\u0416","filterName":"\u041e\u0411\u0416","occupants":0,"rankable":"1","enabled":true},{"id":53,"name":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u044f","slug":"psihologiya","icon":"psychology","bestInName":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u044f","occupants":0,"rankable":"1","enabled":true},{"id":54,"name":"\u041e\u02bbzbek tili","slug":"o_zbek_tili","icon":"uzbek","bestInName":"\u041e\u02bbzbek tili","filterName":"\u041e\u02bbzbek tili","occupants":0,"rankable":"1","enabled":true},{"id":55,"name":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","slug":"kyrgyz_tili","icon":"kyrgyz","bestInName":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","filterName":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","occupants":0,"rankable":"1","enabled":true},{"id":56,"name":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u044f","slug":"astronomiya","icon":"astronomy","bestInName":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u0438","filterName":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u044f","occupants":0,"rankable":"1","enabled":true},{"id":57,"name":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0430 \u0438 \u0441\u043f\u043e\u0440\u0442","slug":"fizkulytura_i_sport","icon":"physical-education","bestInName":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0435","filterName":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0430 \u0438 \u0441\u043f\u043e\u0440\u0442","occupants":0,"rankable":"1","enabled":true},{"id":58,"name":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","slug":"ege_oge","icon":"egzam","bestInName":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","filterName":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","occupants":0,"rankable":"1","enabled":false}]; window.jsData.grades = [{"id":1,"name":"1 - 4 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"1_4_klassy","icon":"lvl1","filterName":"1-4 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":2,"name":"5 - 9 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"5_9_klassy","icon":"lvl2","filterName":"5-9 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":3,"name":"10 - 11 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"10_11_klassy","icon":"lvl3","filterName":"10-11 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":4,"name":"\u0441\u0442\u0443\u0434\u0435\u043d\u0447\u0435\u0441\u043a\u0438\u0439","slug":"studencheskii","icon":"lvl4","filterName":"\u0441\u0442\u0443\u0434\u0435\u043d\u0447\u0435\u0441\u043a\u0438\u0439"}]; window.jsData.ranks = []; window.jsData.challenges = []; // end brainly store items window.jsData.htmlLang = 'ru'; window.jsData.brainlyPages = [{"name":"Brainly.pl","symbol":"PL","url":"https:\/\/brainly.pl","language":"Polski","region":"Polska","regionCode":"PL","code":"pl"},{"name":"Znanija.com","symbol":"RU","url":"https:\/\/znanija.com","language":"\u0420\u0443\u0441\u0441\u043a\u0438\u0439","region":"\u0420\u043e\u0441\u0441\u0438\u044f","regionCode":"RU","code":"ru"},{"name":"Brainly.lat","symbol":"ES","url":"https:\/\/brainly.lat","language":"Espa\u00f1ol","region":"Espa\u00f1a","regionCode":"ES","code":"es"},{"url":"https:\/\/brainly.lat","language":"Espa\u00f1ol","region":"Latinoam\u00e9rica","regionCode":"ES","code":"es"},{"name":"Brainly.com.br","symbol":"PT","url":"https:\/\/brainly.com.br","language":"Portugu\u00eas","region":"Brasil","regionCode":"BR","code":"pt"},{"name":"Nosdevoirs.fr","symbol":"FR","url":"https:\/\/nosdevoirs.fr","language":"Fran\u00e7ais","region":"France","regionCode":"FR","code":"fr"},{"name":"Eodev.com","symbol":"TR","url":"https:\/\/eodev.com","language":"T\u00fcrk\u00e7e","region":"T\u00fcrkiye","regionCode":"TR","code":"tr"},{"name":"Brainly.ro","symbol":"RO","url":"https:\/\/brainly.ro","language":"Rom\u00e2n\u0103","region":"Rom\u00e2nia","regionCode":"RO","code":"ro"},{"name":"Brainly.co.id","symbol":"ID","url":"https:\/\/brainly.co.id","language":"Bahasa Indonesia","region":"Indonesia","regionCode":"ID","code":"id"},{"name":"Brainly.in","symbol":"HI","url":"https:\/\/brainly.in","language":"English","region":"India","regionCode":"IN","code":"en-IN"},{"name":"Brainly.ph","symbol":"PH","url":"https:\/\/brainly.ph","language":"English","region":"Pilipinas","regionCode":"PH","code":"en-PH"},{"name":"Brainly.com","symbol":"US","url":"https:\/\/brainly.com","language":"English","region":"United States","regionCode":"US","code":"en-US"}] window.jsData.registerTosLinkInTextUrl = 'http://znanija.com/pages/politika_konfidentsialnosti'; window.jsData.hasPaymentsEnabled = true; window.jsData.hasVideoMeteringUnlogEnabled = true; window.jsData.videoAdFlowSetupConfig = {"enabled":true,"advertising_adscheduleid":{"dfp":{"mobile":{"ad_units_enabled":"c82ef0e1-245e-4af9-929c-683c8337913b"},"tablet":{"ad_units_enabled":"9f149db9-9925-44ea-83a0-a62043b97a3e"},"desktop":{"ad_units_enabled":"d38e6e5f-48df-4c15-bb88-803d301f5623"},"desktop_wide":{"ad_units_enabled":"6fa673c7-0e5f-43ae-9df4-dbf4e8fe7409"}}},"advertising_schedule":{"dfp":{"mobile":{"ad_units_enabled":{"ads":[{"adTag":"https:\/\/pubads.g.doubleclick.net\/gampad\/live\/ads?iu=\/2165551\/znanija.com\/brk1_question-pg_preroll_Flow&description_url=videourl&env=vp&impl=s&correlator=&tfcd=0&npa=0&gdfp_req=1&output=vast&sz=272x204|312x234|327x245|364x273|366x275|432x324&min_ad_duration=6000&max_ad_duration=30000&unviewed_position_start=1&url=page_url&correlator=random","time":0}]}},"tablet":{"ad_units_enabled":{"ads":[{"adTag":"https:\/\/pubads.g.doubleclick.net\/gampad\/live\/ads?iu=\/2165551\/znanija.com\/brk2_question-pg_preroll_Flow&description_url=videourl&env=vp&impl=s&correlator=&tfcd=0&npa=0&gdfp_req=1&output=vast&sz=640x360&min_ad_duration=6000&max_ad_duration=30000&unviewed_position_start=1&url=page_url&correlator=random","time":0}]}},"desktop":{"ad_units_enabled":{"ads":[{"adTag":"https:\/\/pubads.g.doubleclick.net\/gampad\/live\/ads?iu=\/2165551\/znanija.com\/brk4_question-pg_preroll_Flow&description_url=videourl&env=vp&impl=s&correlator=&tfcd=0&npa=0&gdfp_req=1&output=vast&sz=960x540&min_ad_duration=6000&max_ad_duration=30000&unviewed_position_start=1&url=page_url&correlator=random","time":0}]}},"desktop_wide":{"ad_units_enabled":{"ads":[{"adTag":"https:\/\/pubads.g.doubleclick.net\/gampad\/live\/ads?iu=\/2165551\/znanija.com\/brk4_question-pg_preroll_Flow&description_url=videourl&env=vp&impl=s&correlator=&tfcd=0&npa=0&gdfp_req=1&output=vast&sz=960x540&min_ad_duration=6000&max_ad_duration=30000&unviewed_position_start=1&url=page_url&correlator=random","time":0}]}}}}} window.jsData.videoAdFlowBuildVideoConfig = {"enabled":true,"mobile":{"ad_units_enabled":{"iu":"\/2165551\/znanija.com\/brk1_question-pg_preroll_Flow","output":"vast"}},"tablet":{"ad_units_enabled":{"iu":"\/2165551\/znanija.com\/brk2_question-pg_preroll_Flow","output":"vast"}},"desktop":{"ad_units_enabled":{"iu":"\/2165551\/znanija.com\/brk4_question-pg_preroll_Flow","output":"vast"}},"desktop_wide":{"ad_units_enabled":{"iu":"\/2165551\/znanija.com\/brk4_question-pg_preroll_Flow","output":"vast"}}} window.jsData.videoAdFlowSetupServer = "dfp" window.jsData.videoAdIndexExchangeConfig = {"enabled":false,"timeout":1000,"script_src":"\/\/js-sec.indexww.com\/htv\/htv-brainly.min.js","mobile":{"site_id":351379,"slot_id":1},"tablet":{"site_id":351379,"slot_id":1},"desktop":{"site_id":351378,"slot_id":2},"desktop_wide":{"site_id":351378,"slot_id":2}} window.jsData.videoAdFlowPromoVideos = [{"file":"bda98792-08ec-4cbd-9a00-22f0adad20b8"},{"file":"bcf82b8d-33d7-44cd-9395-43c6ff87eacc"},{"file":"21c993db-7124-4190-ae71-79939b9f72de"}] window.jsData.videoAdBrightcoveCustomOptions = {"video_ad_flow_promo_videos":[{"file":"6214645827001"},{"file":"6214647493001"},{"file":"6214645005001"}],"player_id":"uwwjOBoxWb","account_id":"6207274598001"} window.jsData.paymentsConfig = { currency: '', faqPageUrl: 'https://faq.brainly.com/hc/ru', contactEmail: 'plus@znanija.com', }; window.jsData.paymentsByPayU = true; window.jsData.registrationParentRow = true; window.jsData.paymentsByPayUPublicKey = '7a985100-4936-430e-83cf-af6ea914af9b'; window.jsData.paymentsByPayUEnvName = 'live'; window.jsData.availableRatePlanIds = ["cmF0ZVBsYW46MGYxYjQ2OGItN2UyOC00NzZmLTkwMjYtZDQ5YThhZmYzYWEw","cmF0ZVBsYW46MmM0OTJjODEtYTJiMS00MzE3LTg4NDUtZTkwZjhhZDZjZjc4"] window.jsData.gptAdsConfig = {"network_id":2165551,"div_prefix":"gpt-ad-","search":{"mobile":[{"name":"\/2165551\/znanija.com\/brk1_search-pg_rect_dynamic","divId":"gpt-ad-brk1-search-pg_rect_between_answers","genericId":"search-pg_rect_between_answers","sizes":[[300,250]]}],"tablet":[{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_dynamic","divId":"gpt-ad-brk1-search-pg_rect_between_answers_left","genericId":"search-pg_rect_between_answers_left","sizes":[[300,250]]},{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_dynamic","divId":"gpt-ad-brk1-search-pg_rect_between_answers_right","genericId":"search-pg_rect_between_answers_right","sizes":[[300,250]]}],"desktop":[{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_dynamic","divId":"gpt-ad-brk1-search-pg_rect_between_answers_left","genericId":"search-pg_rect_between_answers_left","sizes":[[300,250]]},{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_dynamic","divId":"gpt-ad-brk1-search-pg_rect_between_answers_right","genericId":"search-pg_rect_between_answers_right","sizes":[[300,250]]},{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_rightrail-sticky","divId":"gpt-ad-brk4_search-pg_rect_rightrail-sticky","genericId":"search-pg_rect_rightrail-sticky","sizes":[[300,600],[300,250],[120,600],[160,600]]},{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_rightrail-sticky","divId":"gpt-ad-brk4_search-pg_rect_rightrail-sticky-log","genericId":"search-pg_rect_rightrail-sticky-log","sizes":[[120,600],[160,600]]},{"name":"\/2165551\/znanija.com\/brk4_search-pg_rect_rightrail-sticky","divId":"gpt-ad-brk4_search-pg_rect_rightrail-sticky-dynamic","genericId":"search-pg_rect_rightrail-sticky-dynamic","sizes":[[300,250]]}],"desktop_wide":[]},"qpage":{"mobile":[{"name":"\/2165551\/znanija.com\/brk1_question-pg_rect_in-question","divId":"gpt-ad-brk1_question-pg_rect_in-question","genericId":"question-pg_rect_in-question","sizes":[[300,600],[300,250]],"stickyInPlaceholder":true},{"name":"\/2165551\/znanija.com\/brk1_question-pg_rect_mtrvideo","divId":"gpt-ad-brk1_question-pg_rect_mtrvideo","genericId":"question-pg_rect_mtrvideo","sizes":[[300,250]]},{"name":"\/2165551\/znanija.com\/brk1_question-pg_rect_dynamic_below_answer","divId":"gpt-ad-brk4_question-pg_rect_dynamic_below_first_answer","genericId":"question-pg_rect_dynamic_below_first_answer","sizes":[[300,600],[300,250]],"stickyInPlaceholder":true},{"name":"\/2165551\/znanija.com\/brk1_question-pg_rect_dynamic_below_answer","divId":"gpt-ad-brk4_question-pg_rect_dynamic_below_second_answer","genericId":"question-pg_rect_dynamic_below_second_answer","sizes":[[300,600],[300,250]],"stickyInPlaceholder":true}],"tablet":[],"desktop":[{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_below-question-left","divId":"gpt-ad-brk4_question-pg_rect_below-question-left","genericId":"question-pg_rect_below-question-left","sizes":[[300,250],[660,360]],"stickyInPlaceholder":true},{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_mtrvideo","divId":"gpt-ad-brk4_question-pg_rect_mtrvideo","genericId":"question-pg_rect_mtrvideo","sizes":[[300,250],[640,360],[960,540]],"excludeBidders":["openwrap"]},{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_rightrail-top-sticky","divId":"gpt-ad-brk4_question-pg_rect_rightrail-top-sticky","genericId":"question-pg_rect_rightrail-top-sticky","sizes":[[300,250]],"onlyNotLogged":true},{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_rightrail-bottom-sticky","divId":"gpt-ad-brk4_question-pg_rect_rightrail-bottom-sticky","genericId":"question-pg_rect_rightrail-bottom-sticky","sizes":[[300,250],[300,600],[320,600]],"onlyNotLogged":true,"stickyInPlaceholder":true},{"name":"\/2165551\/znanija.com\/brk4_question-pg_pxl_special","divId":"gpt-ad-brk4_question-pg_pxl_special","genericId":"question-pg_pxl_special","sizes":[[1,1]]},{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_dynamic_below_answer_left","divId":"gpt-ad-brk4_question-pg_rect_dynamic_below_first_answer_left","genericId":"question-pg_rect_dynamic_below_first_answer_left","sizes":[[300,250],[660,360]],"stickyInPlaceholder":true},{"name":"\/2165551\/znanija.com\/brk4_question-pg_rect_dynamic_below_answer_left","divId":"gpt-ad-brk4_question-pg_rect_dynamic_below_second_answer_left","genericId":"question-pg_rect_dynamic_below_second_answer_left","sizes":[[300,250],[660,360]],"stickyInPlaceholder":true}],"desktop_wide":[]}}; window.jsData.adsMalwareBlockerConfig = {"script_src":"https:\/\/tagan.adlightning.com\/brainly\/op.js"}; window.jsData.qpageNext = {"related_content_legacy":false}; window.jsData.achievementsFeatures = {"subject_name_alternation":true}; window.jsData.leaderboardFeatures = {"leaderboard_spotlight_notification":false,"leaderboard":false}; window.jsData.adsFeatures = {"display_enabled":true,"new_display_ads":true,"new_placeholder":true,"prebid":true,"monitoring":true,"index_exchange":true,"wallpaper":true,"pubmatic":true,"filter_pubmatic_by_ip":true,"age_targeting":true,"has_ad_between_search_results_for_desktop":true}; window.jsData.gtmContainerId = 'GTM-KN3M8C'; window.jsData.monitoringConfig = {"divider":250} window.jsData.openWrapConfig = {"publisher_id":158773,"profil_id":2113,"bidders":["appnexus","pubmatic","rubicon","conversant","districtm","openx","sovrn"]} window.jsData.videoAdVendorOrder = ["brightcove"]; window.jsData.videoAdPrebidBidders = ["appnexus","openx","adtelligent"] window.jsData.videoAdPrebidConfig = {"enabled":true,"debug":false,"cache_url":"https:\/\/prebid.adnxs.com\/pbc\/v1\/cache","bid_timeout":1000,"mobile":{"ad_units_enabled":[{"code":"video","sizes":[[272,204],[312,234],[327,245],[364,273],[366,275],[432,324]],"media_types":{"video":{"context":"instream","player_size":[[272,204],[312,234],[327,245],[364,273],[366,275],[432,324]]}},"bids":{"params":{"video":{"skippable":false,"playback_method":["auto_play_sound_off"]}}}}]},"tablet":{"ad_units_enabled":[{"code":"video","sizes":[[640,360]],"media_types":{"video":{"context":"instream","player_size":[[640,360]]}},"bids":{"params":{"video":{"skippable":false,"playback_method":["auto_play_sound_off"]}}}}]},"desktop":{"ad_units_enabled":[{"code":"video","sizes":[[960,540]],"media_types":{"video":{"context":"instream","player_size":[[960,540]]}},"bids":{"params":{"video":{"skippable":false,"playback_method":["auto_play_sound_off"]}}}}]},"desktop_wide":{"ad_units_enabled":[{"code":"video","sizes":[[960,540]],"media_types":{"video":{"context":"instream","player_size":[[960,540]]}},"bids":{"params":{"video":{"skippable":false,"playback_method":["auto_play_sound_off"]}}}}]},"appnexus_params":{"placement_id":{"brightcove":{"prd":{"dfp":{"mobile":{"ad_units_enabled":14941884},"tablet":{"ad_units_enabled":14941885},"desktop":{"ad_units_enabled":14941886},"desktop_wide":{"ad_units_enabled":14941887}}},"dev":{"dfp":{"mobile":{"ad_units_enabled":10534988},"tablet":{"ad_units_enabled":10534988},"desktop":{"ad_units_enabled":10534988},"desktop_wide":{"ad_units_enabled":10534988}}}}}},"openx_cust_params":{"brightcove":{"del_domain":"brainly-d.openx.net","dfp":{"mobile":{"ad_units_enabled":"540600407"},"tablet":{"ad_units_enabled":"540600606"},"desktop":{"ad_units_enabled":"540600610"},"desktop_wide":{"ad_units_enabled":"540600614"}}}},"adtelligent_params":{"aid":"517477"},"price_granularity":{"buckets":[{"precision":2,"min":0.01,"max":20,"increment":0.01},{"precision":2,"min":20.050000000000001,"max":50,"increment":0.050000000000000003},{"precision":2,"min":51,"max":100,"increment":1}]},"user_sync":{"iframe_enabled":true,"filter_settings":{"iframe":{"bidders":"*","filter":"include"}}}} window.jsData.videoAdOpenwrapConfig = {"enabled":false}; window.jsData.videoAdFlowPlayerSetupTokenConfig = {"enabled":true,"account_id":"de1e3711-c12a-4823-b751-bd5881448426","dfp":{"mobile":{"player_id":"986cd039-db8b-469c-bb20-75d52ef25269","token":"eyJraWQiOiJkMmVwZXVqcEQ2emQiLCJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJjIjoie1wiYWNsXCI6NixcImlkXCI6XCJkMmVwZXVqcEQ2emRcIn0iLCJpc3MiOiJGbG93cGxheWVyIn0.liYpugEriaqvPRD3VfxzyNBUamuFj4WSZ0i7BhsbViikCylW4JB6GwPgGHaGRaYbA_3T7hduCZ6KqOy4xEqN6g"},"tablet":{"player_id":"e5584942-10da-4cfa-98b3-341b05008960","token":"eyJraWQiOiJkMmVwZXVqcEQ2emQiLCJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJjIjoie1wiYWNsXCI6NixcImlkXCI6XCJkMmVwZXVqcEQ2emRcIn0iLCJpc3MiOiJGbG93cGxheWVyIn0.liYpugEriaqvPRD3VfxzyNBUamuFj4WSZ0i7BhsbViikCylW4JB6GwPgGHaGRaYbA_3T7hduCZ6KqOy4xEqN6g"},"desktop":{"player_id":"ad83e449-b7f4-4165-abdf-263a78f71f75","token":"eyJraWQiOiJkMmVwZXVqcEQ2emQiLCJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJjIjoie1wiYWNsXCI6NixcImlkXCI6XCJkMmVwZXVqcEQ2emRcIn0iLCJpc3MiOiJGbG93cGxheWVyIn0.liYpugEriaqvPRD3VfxzyNBUamuFj4WSZ0i7BhsbViikCylW4JB6GwPgGHaGRaYbA_3T7hduCZ6KqOy4xEqN6g"},"desktop_wide":{"player_id":"95641a8e-3210-4cc3-a59f-a80cb40d3d36","token":"eyJraWQiOiJkMmVwZXVqcEQ2emQiLCJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJjIjoie1wiYWNsXCI6NixcImlkXCI6XCJkMmVwZXVqcEQ2emRcIn0iLCJpc3MiOiJGbG93cGxheWVyIn0.liYpugEriaqvPRD3VfxzyNBUamuFj4WSZ0i7BhsbViikCylW4JB6GwPgGHaGRaYbA_3T7hduCZ6KqOy4xEqN6g"}}} window.jsData.videoAdDeviceBasedOptions = {"mobile":{"programmatic_autoplay":false,"autoplay":false,"muted":false,"preload":"metadata"},"tablet":{"programmatic_autoplay":false,"autoplay":false,"muted":false,"preload":"metadata"},"desktop":{"programmatic_autoplay":true,"autoplay":false,"muted":false,"preload":"metadata"},"desktop_wide":{"programmatic_autoplay":true,"autoplay":false,"muted":false,"preload":"metadata"}} window.jsData.flexibleFunnelNameLog = 'F4'; window.jsData.flexibleFunnelNameUnlog = 'F4'; window.jsData.has3dsEnabled = true; window.jsData.hasAccountSettingsPageEnabled = true; window.jsData.branchIOTactics = {"simple_banner":false,"simple_banner_and_popover":false,"gray_blurred_v1":false,"gray_blurred_v2":false,"gray_blurred_v3":false,"gray_blurred_with_skip":false,"gray_blurred_all_with_skip":false,"gray_blurred_with_skip_and_hard_block":false,"red":false,"programmatic_simple_banner":false,"search_blurred":false}; window.jsData.branchIOBudgetLinks = {}; window.jsData.hasEmailRegistrationEnabled = true; window.jsData.hasDelayedDataLayer = true; window.jsData.croTactics = {"has_tutoring_promo":false,"has_tutoring_bottom_banner":false,"has_improved_brainly_plus_promos":false,"has_improved_payments_form":false,"has_mobile_app_landing_page":false,"has_monthly_plans_only":false}; window.jsData.hasSalesElementsHonorCodeLink = true; })();

помогите пожалуйста,алгебра 7 класс...

tanyastvkova @tanyastvkova

October 2021 1 1 Report

помогите пожалуйста,алгебра 7 класс

Answers & Comments

ArturSłavianin 1)домножим на10:
2х-5х=-30
-3х=-30
х=10
2)3а^2+6а-(а^2+6а+9)=3а^2+6а-а^2-6а-9=
2а^2-9=2*(-5)^2-9=41
3)А)81х^3-х=х(81х^2-1)=
х(9х-1)(9х+1)
б)3у^2-30у+75=3(у^2-10у+25)=
3(у-5)^2
4)пусть х-двухместные
у-трехместные
{х+у=6;
{2х+3у=14.
домножим первое уравнение на 2 и решим способом сложения(вычитания):
{2х+2у=12
{2х+3у=14
-у=-2
у=2
подставим значение в любое из уравнений:
х+2=6
х=4
5)у-у0=к(х-х0)
у-8.2=3.6(х+0.5)
у-8.2=3.6х+1.8
у=3.6х+10
проверка:
8.2=3.6*(-0.5)+10
8.2=8.2
Вроде верно