Предмет: Алгебра, автор: zoomkil2004

Пожайлуста помогите решить системы уравнений способом подстановки,
1) 4x+3y=2
x-4y=-9
2) 4x+y=3
6x-2y=1
3) 2x-3y=-12
x+2y=1


zoomkil2004: Помогите пожайлуста,срочно и объясните тему,я не очень её понял.

Ответы

Автор ответа: AmoryBlaine16
2
При решении системы двух линейных уравнений с двумя переменными способом подстановки поступают следующим образом:
1. Выражают из какого-нибудь уравнения системы одну переменную через другую.
2. Подставляют в другое уравнение системы вместо этой переменной полученное выражение.
3. Решают получившееся уравнение с одной переменной.
4. Находят соответствующее значение второй переменной.
Приложения:
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