39=7(2b+7)-4(b-5)

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Solution for 39=7(2b+7)-4(b-5) equation: 



39=7(2b+7)-4(b-5)

We move all terms to the left:

39-(7(2b+7)-4(b-5))=0



We calculate terms in parentheses: -(7(2b+7)-4(b-5)), so:

7(2b+7)-4(b-5)

We multiply parentheses

14b-4b+49+20

We add all the numbers together, and all the variables

10b+69

Back to the equation:

-(10b+69)



We get rid of parentheses

-10b-69+39=0

We add all the numbers together, and all the variables

-10b-30=0

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

-10b=30

b=30/-10

b=-3

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