z-y+xz use x =2, y = -1, z = -3
Simple...z-y+xzx=2y=-1z=-3Plug it in!-3-(-1)+(2)(-3)-3+1-6-2-6-8Thus, your answer, -8.
z - y + x z = ?-3 - -1 + 2 -3 =-2 + -6 = -8