84=-6(m-1)-7m

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Solution for 84=-6(m-1)-7m equation: 



84=-6(m-1)-7m

We move all terms to the left:

84-(-6(m-1)-7m)=0



We calculate terms in parentheses: -(-6(m-1)-7m), so:

-6(m-1)-7m

We add all the numbers together, and all the variables

-7m-6(m-1)

We multiply parentheses

-7m-6m+6

We add all the numbers together, and all the variables

-13m+6

Back to the equation:

-(-13m+6)



We get rid of parentheses

13m-6+84=0

We add all the numbers together, and all the variables

13m+78=0

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

13m=-78

m=-78/13

m=-6

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