84=-2(5m-7)

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Solution for 84=-2(5m-7) equation: 



84=-2(5m-7)

We move all terms to the left:

84-(-2(5m-7))=0



We calculate terms in parentheses: -(-2(5m-7)), so:

-2(5m-7)

We multiply parentheses

-10m+14

Back to the equation:

-(-10m+14)



We get rid of parentheses

10m-14+84=0

We add all the numbers together, and all the variables

10m+70=0

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

10m=-70

m=-70/10

m=-7

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