Diketahui nilai x = -3, y = 4 dan z = -5 nilai (3x + 4y - z) - (x - 3y + 2z) =...

(3x +4y -z) - (x-3y +2z)
3× +4y -z -x + 3y -2z
3x-x +4y +3y -z -2z
2x +7y -3z
2(-4) +7(4) -3 (-5)
-8 +28 +15
35

(-9+16+5)-(-3-12-10) 
=12 - (-25)
=37