systems of equations (3 variables)

x - 3y + 2z = 15 3x + y + 9z = 43 -x + 4y + z = 1

(-3, -2, 6)

x + y + z = 3 2x + 2y - z = -9 x + 3y - 4z = -26

(0, -2, 5)

x + y + z = 6 2x - y + 2z = 3 x + 4y - z = 11

(1, 3, 2)

2x + 2y + z = 23 x - 2y - 2z = 5 -x - 2y + 3z = 8

(11, -2, 5)

x + y + z = -1 4x - y + 2z = -8 x + 7y - z = 39

(3, 4, -8)