Respuesta :

chrysalism
First, we're going to distribute both fives out, which gives us this:
5z + 20 + 10 - 5z
Then, we can combine the like terms. However, since they are opposites, they cancel out, which gives us:
20 + 10
This equals 30.
Hope this helps!
~Chrys
kaylicox

Answer:

30

Step-by-step explanation: