Оля и Катя вместе весит 70 кг. Катя и Даша – тоже 70 кг. Оля и Даша весит 76 кг сколько весит даша?. Created by DaRynaBarysheva. matematika-ru

Оля весит х кгКатя у кгДаша z кг{х+у=70 => y=70-x{у+z=70{x+z=76 => z=76-x70-x+76-x=702x=76x=38 кг весит Оляу=70-x=70-38=32 кг весит Катяz=76-x=76-38=38 кг весит Даша Новые вопросы в МатематикаВыполните действия:1) 24 мин 24 c : 2;2) 12 ч 30 мин : 3;3) 10 м 50 см : 5;4) 100 kr 50 r: 10;5) 5 кг 100 г : 5;6) 8 дм 48 мм : 16."0°. Выполните1) 12 180:42;2) 22 250: 250;деление:3) 91 656: 456;4) 10 800 120;5) 66 690: 702;6) 211 890: 2018.1 задание максимум баллов1 задание помогите пожалуйстаПомогите пожалуйста!!! Буду очень благодарна!!! 3 5/9 +(-2 1/4) - (-4 5/6)-5 2/3Як називають сторони граней прямокутного паралелепіпеда?Якою геометричною фігурою є кожна з граней прямокутного паралелепіпеда?18 пж решить....... срочно2)Найти общий интеграл однородного ДУ 2 x² + xy-5 y² y' = 2 X х². -6 ху 2 ) Найти общий интеграл однородного ДУ 2 x² + xy - 5 y² y ' = 2 X х² . -6 хуВыполните действияА)3 6/11+4 2/11Б)11 3/8 - 9 1/8В)11 2/11 - 9 2/11+4 711 - 5 1/11Помогите пожалуйста решитьПредыдущийСледующийВместе мы знаем большеЭтот сайт использует cookies Политика Cookies . 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Оля и Катя вместе весит 70 кг. Катя и Даша – тоже 70 кг. Оля и Даша весит 76 кг ...

DaRynaBarysheva @DaRynaBarysheva

July 2022 1 2 Report

Оля и Катя вместе весит 70 кг. Катя и Даша – тоже 70 кг. Оля и Даша весит 76 кг сколько весит даша?

Answers & Comments

dustInEyes

Verified answer

Оля весит х кг
Катя у кг
Даша z кг

{х+у=70 => y=70-x
{у+z=70
{x+z=76 => z=76-x

70-x+76-x=70
2x=76
x=38 кг весит Оля
у=70-x=70-38=32 кг весит Катя
z=76-x=76-38=38 кг весит Даша