9b+9=2b+3(b-7)

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Solution for 9b+9=2b+3(b-7) equation: 



9b+9=2b+3(b-7)

We move all terms to the left:

9b+9-(2b+3(b-7))=0



We calculate terms in parentheses: -(2b+3(b-7)), so:

2b+3(b-7)

We multiply parentheses

2b+3b-21

We add all the numbers together, and all the variables

5b-21

Back to the equation:

-(5b-21)



We get rid of parentheses

9b-5b+21+9=0

We add all the numbers together, and all the variables

4b+30=0

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

4b=-30

b=-30/4

b=-7+1/2

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