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30m+120=75m-50
We move all terms to the left:
30m+120-(75m-50)=0
We get rid of parentheses
30m-75m+50+120=0
We add all the numbers together, and all the variables
-45m+170=0
We move all terms containing m to the left, all other terms to the right
-45m=-170
m=-170/-45
m=3+7/9
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