решите пж до завтрашнего дня. Created by александраким1. matematika-ru

1561.1)Приводим к общему знаменателю:Раскрываем скобки и приводим подобные. В конце ставим множители для уравнивания одной из неизвестных:{20x - 12у = -56,{9x + 12y = 27____________29x = -29 x = -29/29 = -1.y = (9-3x)/4 = (9-3*(-1))/4 = 12/4 = 3.Остальные задания решаются аналогично. спасибо большое сможешь 3 решить пж А как же ты научишься математике, если не будешь сама решать задания??? Тем более, что тебе дан образец!!! я пешала по образцу Реклама Реклама Новые вопросы в Математика рівняння 11,7:(63-х)=65 Найдите все простые решения двойных неравенств: 1) 45 Первое число равно n, второе на 6, а третье в 3 раза больше первого: a) составь выражение для определения суммы этих чисел; b) найди его значение при … n = 5. Ответ: a) n ; b) . Доведіть, що коли серед даних чисел знайдеться одне, яке дорівнює сумі решти чисел, то сума всіх даних чисел е парним числом СРОЧНО!!!ВЫБЕРЕТЕ ВЕРНОЕ РАВЕНСТВО!!!ДАЮ 35 БАЛЛОВ Разложи число 108 на простые множители (запиши множители порядке возрастания, одинаковые множители записывай в виде степени). Ответ: 108 = ⋅. Ответить … ! помогите споситекееееееееееееееееееееееееееее 1) EKUB ( 72,125,310)=?2)EKUB (214,668,840)=?3)EKUB (1024,2048)=?Помогите пожалуйста Срочно пожалуйста!Розв'яжіть рівняння 9х+54=0. составить уравнение из букв и цифрна Подобе этогоn×m=35 и РЕШИТЬ Предыдущий Следующий Реклама - это не так уж плохо Реклама - это не так уж плохо Понимаем - вы пришли сюда не за рекламой. Но она помогает нам предоставлять бесплатный доступ к Знаниям. Пожалуйста, внесите наш сайт в список разрешенных. ОК, разблокирую рекламу на Знаниях! Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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решите пж до завтрашнего дня...

александраким1 @александраким1

September 2021 1 10 Report

решите пж до завтрашнего дня

Answers & Comments

dnepr1

Verified answer

1561.1)
$\left \{ {{ \frac{x+7}{3}- \frac{y-8}{5}=3 } \atop { \frac{x+5}{4}+ \frac{y+9}{3}=5 }} \right.$
Приводим к общему знаменателю:
$\left \{ {{5(x+7)-3(y-8)=3*15} \atop {3(x+5)+4(y+9)=5*12}} \right.$
Раскрываем скобки и приводим подобные. В конце ставим множители для уравнивания одной из неизвестных:
$\left \{ {{5x-3y=-14}|*4 \atop {3x+4y=9}|*3} \right.$
{20x - 12у = -56,
{9x + 12y = 27
____________
29x = -29
x = -29/29 = -1.
y = (9-3x)/4 = (9-3*(-1))/4 = 12/4 = 3.

Остальные задания решаются аналогично.

спасибо большое
сможешь 3 решить пж
А как же ты научишься математике, если не будешь сама решать задания??? Тем более, что тебе дан образец!!!
я пешала по образцу