x = - 1, y = 4, z = 3
x + z = - 1 + 3 = 2
3z - 2y + x = 3* 3 - 2* 4 + (- 1) = 9 - 8 - 1 = 0
2z - y = 2* 3 - 4 = 6 - 4 = 2
2y + 6x = 2* 4 + 6* (-1) = 8 - 6 = 2
xyz + 10 = -1 * 4* 3 = - 12
5x + 2y + z = 5 * (-1) + 2* 4 + 3 = - 5 + 8 + 3 = 6
yz + 10x = 4 * 3 + 10 * (- 1) = 12 - 10 = 2
y - z + x = 4 - 3 + (- 1) = 0
2xz + y = 2 * (-1) * 3 + 4 = -6 + 4 = -2
(z - x): 2 = (3 - (-1)): 2 = (3 + 1): 2 = 4 : 2 = 2
12 - 5z - x = 12 - 5 * 3 - (- 1) = 12 -15 + 1 = -2
