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53=-12+m
We move all terms to the left:
53-(-12+m)=0
We add all the numbers together, and all the variables
-(m-12)+53=0
We get rid of parentheses
-m+12+53=0
We add all the numbers together, and all the variables
-1m+65=0
We move all terms containing m to the left, all other terms to the right
-m=-65
m=-65/-1
m=+65
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