Answer:
C. 9x+42
Explanation:
The equation is 6(x+7)+3x
First, you would start with the distributive property...
6(x+7)
6 times x =6x
6 times 7= 42
So the equation comes to..
6x+42+3x
Combine the like terms
6x+3x= 9x
9x+42
So C would be your answer
Ok so the best way to solve this problem is to simplify it as small as possible so first with the given equation 6(x+7)+3x you need to use the distributive property on 6(x+7)
This should get you 6x + 42
Then you have to add everything with like terms (or everything with the variable x) So add together 6x + 3x and that should get you 9x
So now you are left with
9x + 42 which is C
Hope this helps :D
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