-20+15=m+7

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Solution for -20+15=m+7 equation: 



-20+15=m+7

We move all terms to the left:

-20+15-(m+7)=0

We add all the numbers together, and all the variables

-(m+7)-5=0

We get rid of parentheses

-m-7-5=0

We add all the numbers together, and all the variables

-1m-12=0

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

-m=12

m=12/-1

m=-12

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