9-b=-4b-7(b-7)

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Solution for 9-b=-4b-7(b-7) equation: 



9-b=-4b-7(b-7)

We move all terms to the left:

9-b-(-4b-7(b-7))=0

We add all the numbers together, and all the variables

-1b-(-4b-7(b-7))+9=0



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

-4b-7(b-7)

We multiply parentheses

-4b-7b+49

We add all the numbers together, and all the variables

-11b+49

Back to the equation:

-(-11b+49)



We get rid of parentheses

-1b+11b-49+9=0

We add all the numbers together, and all the variables

10b-40=0

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

10b=40

b=40/10

b=4

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