-3(3x-2y)+2(x-2y)= -9x + 6y + 2x - 4 y = -7x + 2y
-3(3x-2y)+2(x-2y)+-9x+6y+2x-4y=-7x+2y
-3(3x-2y)+2(x-2y)= -9x + 6y + 2x - 4y = -7x +2y