-12m-5-9+4m=8m-13m+15-8

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Solution for -12m-5-9+4m=8m-13m+15-8 equation: 



-12m-5-9+4m=8m-13m+15-8

We move all terms to the left:

-12m-5-9+4m-(8m-13m+15-8)=0

We add all the numbers together, and all the variables

-12m+4m-(-5m+7)-5-9=0

We add all the numbers together, and all the variables

-8m-(-5m+7)-14=0

We get rid of parentheses

-8m+5m-7-14=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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