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14m=18+21m
We move all terms to the left:
14m-(18+21m)=0
We add all the numbers together, and all the variables
14m-(21m+18)=0
We get rid of parentheses
14m-21m-18=0
We add all the numbers together, and all the variables
-7m-18=0
We move all terms containing m to the left, all other terms to the right
-7m=18
m=18/-7
m=-2+4/7
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