Предмет: Алгебра, автор: danil12122

Розвяжіть систему рівнянь способом додавання $left { {{2x-5y=-1} atop {5x-y=9}} right.$

Ответы

Автор ответа: Аноним

2х - 5y = - 1
5x - y = 9
Решение способом сложения
10х - 25y = - 5
-10x + 2y = - 18
- 23y = - 23
y = 1
5x - 1 = 9
5x = 10
x = 2
Ответ ( 2 ; 1 )

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