Предмет: Математика, автор: aldinaa034

Срочно математика фото внизу

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Автор ответа: psp7878

Ответ:

Пошаговое объяснение:

1) способом подстановки:

выражаешь из 2 уравнения у, получается у= -2-2х. подставляешь это выражение вместо у в первое уравнение и получается: 5(-2-2х)+6х=6

находим х: -10-10х+6х=6, х= -4, теперь находим у, подставляя значение х: у=-2-2*(-4)=10

2) способом сложения:

домножаем второе уравнение на -5, получаем -5у+10х=-10, складываем его с первым уравнением и получаем: 16х=-4, следовательно х= -4, находим y c помощью подстановки числа в любое уравнение

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