Solve for both systems: 4x - 4y = - 56 and 4x + y = - 36

4x + y = - 36

4x-4x + y = - 36-4x

y = - 36-4x

4x - 4y = - 56

4x - 4(- 36-4x) = - 56

4x - 4(- 36) (-4)(-4x) = - 56

4x+144+16x=-56

144+20x=-56

144+20x-144=-56-144

20x=-200

20x/20=-200/20

x=-10

y = - 36-4x

y = - 36-4(-10)

y = - 36+40=4