-7m+8=-13

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Solution for -7m+8=-13 equation: 



-7m+8=-13

We move all terms to the left:

-7m+8-(-13)=0

We add all the numbers together, and all the variables

-7m+21=0

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

-7m=-21

m=-21/-7

m=+3

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