The teacher will be very surprised to see your correct solution 😉
-5 - 5*z2 - 3*z - 2*x + 2*y2 + 4*y + 5*x2 = 0
-2*x + 5*x2 + 4*y + 2*y2 - 3*z - 5*z2 - 5 = 0