7b+15=3(3b-7)

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Solution for 7b+15=3(3b-7) equation: 



7b+15=3(3b-7)

We move all terms to the left:

7b+15-(3(3b-7))=0



We calculate terms in parentheses: -(3(3b-7)), so:

3(3b-7)

We multiply parentheses

9b-21

Back to the equation:

-(9b-21)



We get rid of parentheses

7b-9b+21+15=0

We add all the numbers together, and all the variables

-2b+36=0

We move all terms containing b to the left, all other terms to the right

-2b=-36

b=-36/-2

b=+18

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