86.4=8(m+2.1)

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Solution for 86.4=8(m+2.1) equation: 



86.4=8(m+2.1)

We move all terms to the left:

86.4-(8(m+2.1))=0



We calculate terms in parentheses: -(8(m+2.1)), so:

8(m+2.1)

We multiply parentheses

8m+16.8

Back to the equation:

-(8m+16.8)



We get rid of parentheses

-8m-16.8+86.4=0

We add all the numbers together, and all the variables

-8m+69.6=0

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

-8m=-69.6

m=-69.6/-8

m=8+3.5/5

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