Question

(x+2y=1
{-x + 2 y =-3​

Answer 1

на фото))))))))))))))))))))))))

Answer 2

Ответ:

$x = 1 - 2y \ \ - (1 - 2y) + 2y = 3 \ - 1 + 2y + 2y = 3 \ 4y = 4 \ y = 1 \ \ x = 1 - 2y \ x = 1 - 2 times 1 \ x = 1 - 2 \ x = - 1 \ \ y = 1 \ x = - 1$