138-17=7(-9+3b)+2b

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Solution for 138-17=7(-9+3b)+2b equation: 



138-17=7(-9+3b)+2b

We move all terms to the left:

138-17-(7(-9+3b)+2b)=0

We add all the numbers together, and all the variables

-(7(3b-9)+2b)+138-17=0

We add all the numbers together, and all the variables

-(7(3b-9)+2b)+121=0



We calculate terms in parentheses: -(7(3b-9)+2b), so:

7(3b-9)+2b

We add all the numbers together, and all the variables

2b+7(3b-9)

We multiply parentheses

2b+21b-63

We add all the numbers together, and all the variables

23b-63

Back to the equation:

-(23b-63)



We get rid of parentheses

-23b+63+121=0

We add all the numbers together, and all the variables

-23b+184=0

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

-23b=-184

b=-184/-23

b=+8

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