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14+20m=28+13m
We move all terms to the left:
14+20m-(28+13m)=0
We add all the numbers together, and all the variables
20m-(13m+28)+14=0
We get rid of parentheses
20m-13m-28+14=0
We add all the numbers together, and all the variables
7m-14=0
We move all terms containing m to the left, all other terms to the right
7m=14
m=14/7
m=2
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