- 2x + 4y = - 22
- 2x + 4y-4y = - 22 -4y
-2x=- 22 -4y
-2x/-2=- 22 -4y/-2
x=11+2y
- 2x - 4y = 42
- 2(11+2y) - 4y = 42
- 2(11) (-2)(+2y) - 4y = 42
-22-4y-4y=42
-22-8y=42
-22-8y+22=42+22
-8y=64
-8y/-8=64/-8
y=-8
x=11+2y
x=11+2(-8)
x=11-16=-5