Предмет: Алгебра, автор: yulia270989

Розв'язком якої із систем рiвнянь є пара чисел (-1; 2)?
1. x + y = 1,
x-y=3
2. x-y=-3
x+y=-1
3. x+y=1
y-x=3
4. y-x=-3
x+y=1.
СРОЧНО ​

Ответы

Автор ответа: smeleshko7
1

Третє рівняння підходить.

Автор ответа: artyrarytyan
1
Система №2 є розв'язком, оскільки (-1; 2) задовольняє обидва рівняння цієї системи.
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