-13+4m=8+7m

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Solution for -13+4m=8+7m equation: 



-13+4m=8+7m

We move all terms to the left:

-13+4m-(8+7m)=0

We add all the numbers together, and all the variables

4m-(7m+8)-13=0

We get rid of parentheses

4m-7m-8-13=0

We add all the numbers together, and all the variables

-3m-21=0

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

-3m=21

m=21/-3

m=-7

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