(b+3)=(4b-9)

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Solution for (b+3)=(4b-9) equation: 



(b+3)=(4b-9)

We move all terms to the left:

(b+3)-((4b-9))=0

We get rid of parentheses

b-((4b-9))+3=0



We calculate terms in parentheses: -((4b-9)), so:

(4b-9)

We get rid of parentheses

4b-9

Back to the equation:

-(4b-9)



We get rid of parentheses

b-4b+9+3=0

We add all the numbers together, and all the variables

-3b+12=0

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

-3b=-12

b=-12/-3

b=+4

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