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8m+30=-5m+-9
We move all terms to the left:
8m+30-(-5m+-9)=0
We add all the numbers together, and all the variables
8m-(-5m-9)+30=0
We get rid of parentheses
8m+5m+9+30=0
We add all the numbers together, and all the variables
13m+39=0
We move all terms containing m to the left, all other terms to the right
13m=-39
m=-39/13
m=-3
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