Question

-2 х + 2y = 4
x + y = -2​

Answer 1

-2x+2y = 4
x = -2-y

-2(-2-y)+2y = 4
4+2y+2y = 4
4y = 0
y = 0

x = -2-0
x = -2

(x, y) = (-2, 0)

Answer 2

-2x + 2y = 4

x + y = -2

-2x + x = 4 + (-2)

-x = 2

x = -2

-2(-2) + 2y = 4

-2 + y = -2

4 + 2y = 4

-2 + y = -2

2y = 0

y = 0

x = -2, y = 0

Rpta: -2, 0

Espero que te sirva