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-15=5m+12-2m+6
We move all terms to the left:
-15-(5m+12-2m+6)=0
We add all the numbers together, and all the variables
-(3m+18)-15=0
We get rid of parentheses
-3m-18-15=0
We add all the numbers together, and all the variables
-3m-33=0
We move all terms containing m to the left, all other terms to the right
-3m=33
m=33/-3
m=-11
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