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

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Answer 1 · 2018-06-06T20:23:27

#15z - 1#

#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#