-31=8-6m-7m

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Solution for -31=8-6m-7m equation: 



-31=8-6m-7m

We move all terms to the left:

-31-(8-6m-7m)=0

We add all the numbers together, and all the variables

-(-13m+8)-31=0

We get rid of parentheses

13m-8-31=0

We add all the numbers together, and all the variables

13m-39=0

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

13m=39

m=39/13

m=3

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