Respuesta :

First, distribute the 3 into (-4z+5w):

3w+12z-15w+4z
Combine like terms:

3w-15w+12z+4z
-12w + 16z
3w - 3 (-4z + 5w) + 4z

Distribute -3:
= 3w + 12z - 15w + 4z

Combine like terms:
= -12w + 16z

Answer: 
-12w + 16z
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