-91=7(4-4m)+7m

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Solution for -91=7(4-4m)+7m equation: 



-91=7(4-4m)+7m

We move all terms to the left:

-91-(7(4-4m)+7m)=0

We add all the numbers together, and all the variables

-(7(-4m+4)+7m)-91=0



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

7(-4m+4)+7m

We add all the numbers together, and all the variables

7m+7(-4m+4)

We multiply parentheses

7m-28m+28

We add all the numbers together, and all the variables

-21m+28

Back to the equation:

-(-21m+28)



We get rid of parentheses

21m-28-91=0

We add all the numbers together, and all the variables

21m-119=0

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

21m=119

m=119/21

m=5+2/3

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