Hi, 2x + y - 4z = 3 -3x + 4y – z = -2 2x + y - 4z = 3 12x -16y + 4z = 8 14x - 15y = 11 |- 2y + 3Y = 4, 14x - 60 = 11 14x = 71 142/14 + 56/14 - 4z = 42/14 |using 2x + y - 4z = 3 156/14= 4z