8,-15=5m+21

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Solution for 8,-15=5m+21 equation: 



8.-15=5m+21

We move all terms to the left:

8.-15-(5m+21)=0

We add all the numbers together, and all the variables

-(5m+21)-7=0

We get rid of parentheses

-5m-21-7=0

We add all the numbers together, and all the variables

-5m-28=0

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

-5m=28

m=28/-5

m=-5+3/5

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