Answer:
60x + 18
Step-by-step explanation:
6 (9x + 3) + 6x
distribute
54x + 18 + 6x
combine like-terms
Simplify
6(9x+3)+6x
Distribute:
=(6)(9x)+(6)(3)+6x
=54x+18+6x
Combine Like Terms:
=(54x+6x)+(18)
=60x+18
