-99=9(m+87)

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Solution for -99=9(m+87) equation: 



-99=9(m+87)

We move all terms to the left:

-99-(9(m+87))=0



We calculate terms in parentheses: -(9(m+87)), so:

9(m+87)

We multiply parentheses

9m+783

Back to the equation:

-(9m+783)



We get rid of parentheses

-9m-783-99=0

We add all the numbers together, and all the variables

-9m-882=0

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

-9m=882

m=882/-9

m=-98

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