Respuesta :

loreal33
-3z + 17 + 15z + 4

Combine like terms.

12z + 21 is a similar expression.


Proof:

z = 2

-3(2) + 17 + 15(2) + 4

-6 + 17 + 30 + 4 = 45


12(2) + 21

24 + 21 = 45