-90=-9(m+2)

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Solution for -90=-9(m+2) equation: 



-90=-9(m+2)

We move all terms to the left:

-90-(-9(m+2))=0



We calculate terms in parentheses: -(-9(m+2)), so:

-9(m+2)

We multiply parentheses

-9m-18

Back to the equation:

-(-9m-18)



We get rid of parentheses

9m+18-90=0

We add all the numbers together, and all the variables

9m-72=0

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

9m=72

m=72/9

m=8

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