-9=-(b+7)

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



-9=-(b+7)

We move all terms to the left:

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



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

-(b+7)

We get rid of parentheses

-b-7

We add all the numbers together, and all the variables

-1b-7

Back to the equation:

-(-1b-7)



We get rid of parentheses

1b+7-9=0

We add all the numbers together, and all the variables

b-2=0

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

b=2

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