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-m+(3m-6m)=-8-15
We move all terms to the left:
-m+(3m-6m)-(-8-15)=0
We add all the numbers together, and all the variables
-m+(-3m)-(-23)=0
We add all the numbers together, and all the variables
-1m+(-3m)+23=0
We get rid of parentheses
-1m-3m+23=0
We add all the numbers together, and all the variables
-4m+23=0
We move all terms containing m to the left, all other terms to the right
-4m=-23
m=-23/-4
m=5+3/4
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