12(b+11)=13(b-9)

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Solution for 12(b+11)=13(b-9) equation: 



12(b+11)=13(b-9)

We move all terms to the left:

12(b+11)-(13(b-9))=0

We multiply parentheses

12b-(13(b-9))+132=0



We calculate terms in parentheses: -(13(b-9)), so:

13(b-9)

We multiply parentheses

13b-117

Back to the equation:

-(13b-117)



We get rid of parentheses

12b-13b+117+132=0

We add all the numbers together, and all the variables

-1b+249=0

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

-b=-249

b=-249/-1

b=+249

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