4(3x+y)-1=y-2x 2(4x-y)+19=-x 12x+4y-1=y-2x 8x-2y+19=-x 14x+3y=1 9x-2y=-19 28x+6y=2 27x-6y=-57 55x=-55 x=-1 4(-3+y)-1=y+2 -12+4y-1=y+2 3y=15 y=5