Use substitution to it

7) 4x - 2y=-22

-x+y=3

Rearrange - x+y = 3 to y = x+3

Then substitute into the first equation.

4x - 2 (x+3) = - 22

4x - 2x - 6 = - 22

2x - 6 = - 22

2x = - 16

x = - 8

Then I put this into y = x+3

y = - 8 + 3

y = - 5