-(m-7)=12

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Solution for -(m-7)=12 equation: 



-(m-7)=12

We move all terms to the left:

-(m-7)-(12)=0

We get rid of parentheses

-m+7-12=0

We add all the numbers together, and all the variables

-1m-5=0

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

-m=5

m=5/-1

m=-5

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