15=3(b+3)

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



15=3(b+3)

We move all terms to the left:

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



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

3(b+3)

We multiply parentheses

3b+9

Back to the equation:

-(3b+9)



We get rid of parentheses

-3b-9+15=0

We add all the numbers together, and all the variables

-3b+6=0

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

-3b=-6

b=-6/-3

b=+2

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