-91=7(1+2m)

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Solution for -91=7(1+2m) equation: 



-91=7(1+2m)

We move all terms to the left:

-91-(7(1+2m))=0

We add all the numbers together, and all the variables

-(7(2m+1))-91=0



We calculate terms in parentheses: -(7(2m+1)), so:

7(2m+1)

We multiply parentheses

14m+7

Back to the equation:

-(14m+7)



We get rid of parentheses

-14m-7-91=0

We add all the numbers together, and all the variables

-14m-98=0

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

-14m=98

m=98/-14

m=-7

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