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m-5=3m+13
We move all terms to the left:
m-5-(3m+13)=0
We get rid of parentheses
m-3m-13-5=0
We add all the numbers together, and all the variables
-2m-18=0
We move all terms containing m to the left, all other terms to the right
-2m=18
m=18/-2
m=-9
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