84=-7(m-4)-7m

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Solution for 84=-7(m-4)-7m equation: 



84=-7(m-4)-7m

We move all terms to the left:

84-(-7(m-4)-7m)=0



We calculate terms in parentheses: -(-7(m-4)-7m), so:

-7(m-4)-7m

We add all the numbers together, and all the variables

-7m-7(m-4)

We multiply parentheses

-7m-7m+28

We add all the numbers together, and all the variables

-14m+28

Back to the equation:

-(-14m+28)



We get rid of parentheses

14m-28+84=0

We add all the numbers together, and all the variables

14m+56=0

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

14m=-56

m=-56/14

m=-4

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