-113=b+7(7-4b)

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Solution for -113=b+7(7-4b) equation: 



-113=b+7(7-4b)

We move all terms to the left:

-113-(b+7(7-4b))=0

We add all the numbers together, and all the variables

-(b+7(-4b+7))-113=0



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

b+7(-4b+7)

We multiply parentheses

b-28b+49

We add all the numbers together, and all the variables

-27b+49

Back to the equation:

-(-27b+49)



We get rid of parentheses

27b-49-113=0

We add all the numbers together, and all the variables

27b-162=0

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

27b=162

b=162/27

b=6

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