90=9(m+2.1)

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Solution for 90=9(m+2.1) equation: 



90=9(m+2.1)

We move all terms to the left:

90-(9(m+2.1))=0



We calculate terms in parentheses: -(9(m+2.1)), so:

9(m+2.1)

We multiply parentheses

9m+18.9

Back to the equation:

-(9m+18.9)



We get rid of parentheses

-9m-18.9+90=0

We add all the numbers together, and all the variables

-9m+71.1=0

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

-9m=-71.1

m=-71.1/-9

m=7+7.3636363636364/8.1818181818182

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