Verified Answer :

first you use the distrbutive property and multiply 6 by x and 6 by 1 then you get 15 + 6x + 6 now add 15 and 6 together and you get 21 + 6x as your answer

Exvited

15 + 6(x + 1)

First, expand to get rid of parentheses. 
\(15 + 6x + 6\)
Second, simplify. Keep your 6x and add 15 + 6.
\(6x + 21\)

Answer: 6x + 21

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