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13=-3m+-5
We move all terms to the left:
13-(-3m+-5)=0
We add all the numbers together, and all the variables
-(-3m-5)+13=0
We get rid of parentheses
3m+5+13=0
We add all the numbers together, and all the variables
3m+18=0
We move all terms containing m to the left, all other terms to the right
3m=-18
m=-18/3
m=-6
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