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20m=20+5+3+9m
We move all terms to the left:
20m-(20+5+3+9m)=0
We add all the numbers together, and all the variables
20m-(9m+28)=0
We get rid of parentheses
20m-9m-28=0
We add all the numbers together, and all the variables
11m-28=0
We move all terms containing m to the left, all other terms to the right
11m=28
m=28/11
m=2+6/11
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