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3m-4=-(2m+15)
We move all terms to the left:
3m-4-(-(2m+15))=0
We calculate terms in parentheses: -(-(2m+15)), so:We get rid of parentheses
-(2m+15)
We get rid of parentheses
-2m-15
Back to the equation:
-(-2m-15)
3m+2m+15-4=0
We add all the numbers together, and all the variables
5m+11=0
We move all terms containing m to the left, all other terms to the right
5m=-11
m=-11/5
m=-2+1/5
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