-31=-7m-3

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Solution for -31=-7m-3 equation: 



-31=-7m-3

We move all terms to the left:

-31-(-7m-3)=0

We get rid of parentheses

7m+3-31=0

We add all the numbers together, and all the variables

7m-28=0

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

7m=28

m=28/7

m=4

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