2x - y + z = 12 2y - 3z = -16 3y + 2z = 2 ------ 6y - 9z = -48 ---- 2nd eqn times 3 6y + 4z = 4 ---- 3rd eqn times 2 ----------------------------- Subtract -13z = -52 z = 4 ============== y = -2 ======= x = 5