81=9(m+4)

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Solution for 81=9(m+4) equation: 



81=9(m+4)

We move all terms to the left:

81-(9(m+4))=0



We calculate terms in parentheses: -(9(m+4)), so:

9(m+4)

We multiply parentheses

9m+36

Back to the equation:

-(9m+36)



We get rid of parentheses

-9m-36+81=0

We add all the numbers together, and all the variables

-9m+45=0

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

-9m=-45

m=-45/-9

m=+5

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