Solve for x and y y+8=-4 (x+7)

Because you can't solve for two variables at once, you can guess and trial/error.

You can also give x or y any value, and then solve for the opposite variable.

x = 0

y = - 36

for example. There are more solutions.

y + 8 = - 4 (x+7)

-36 + 8 = - 4 (0+7)

-28 = 0 - 28

-28 = - 28