How do you combine like terms in 3( z + 5) + 4( 3z - 4)?

1 Answer
Jun 6, 2018

15z - 1

Explanation:

3(z+5) + 4(3z - 4)

First, use the distributive property

3(z)+3(5) + 4(3z) + 4(-4)

3z + 15+12z -16

Now, like-terms can be combined

(3+12)z +(15-16)

15z - 1