-9(-19b+8)=-2b-9(-20b-13)

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Solution for -9(-19b+8)=-2b-9(-20b-13) equation: 



-9(-19b+8)=-2b-9(-20b-13)

We move all terms to the left:

-9(-19b+8)-(-2b-9(-20b-13))=0

We multiply parentheses

171b-(-2b-9(-20b-13))-72=0



We calculate terms in parentheses: -(-2b-9(-20b-13)), so:

-2b-9(-20b-13)

We multiply parentheses

-2b+180b+117

We add all the numbers together, and all the variables

178b+117

Back to the equation:

-(178b+117)



We get rid of parentheses

171b-178b-117-72=0

We add all the numbers together, and all the variables

-7b-189=0

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

-7b=189

b=189/-7

b=-27

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