Предмет: Математика, автор: karinka0001182

Решите систему
x+y=300
x-0,5y=120

Ответы

Автор ответа: axicorp6r2co

12

Ответ:

x=180

y=120

Пошаговое объяснение:

y=300-x

x-0.5(300-x)=120

x-150+0.5x=120

1.5x=120+150

1.5x=270

x=270/1.5

x=180

y=300-180

y=120

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