-5b-39=7(3-5b)

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Solution for -5b-39=7(3-5b) equation: 



-5b-39=7(3-5b)

We move all terms to the left:

-5b-39-(7(3-5b))=0

We add all the numbers together, and all the variables

-5b-(7(-5b+3))-39=0



We calculate terms in parentheses: -(7(-5b+3)), so:

7(-5b+3)

We multiply parentheses

-35b+21

Back to the equation:

-(-35b+21)



We get rid of parentheses

-5b+35b-21-39=0

We add all the numbers together, and all the variables

30b-60=0

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

30b=60

b=60/30

b=2

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