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102m+(-84m)=3
We move all terms to the left:
102m+(-84m)-(3)=0
We get rid of parentheses
102m-84m-3=0
We add all the numbers together, and all the variables
18m-3=0
We move all terms containing m to the left, all other terms to the right
18m=3
m=3/18
m=1/6
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