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7m+13=4m+8
We move all terms to the left:
7m+13-(4m+8)=0
We get rid of parentheses
7m-4m-8+13=0
We add all the numbers together, and all the variables
3m+5=0
We move all terms containing m to the left, all other terms to the right
3m=-5
m=-5/3
m=-1+2/3
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