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4m+4m-9+9=3m+4m-7+4
We move all terms to the left:
4m+4m-9+9-(3m+4m-7+4)=0
We add all the numbers together, and all the variables
4m+4m-(7m-3)-9+9=0
We add all the numbers together, and all the variables
8m-(7m-3)=0
We get rid of parentheses
8m-7m+3=0
We add all the numbers together, and all the variables
m+3=0
We move all terms containing m to the left, all other terms to the right
m=-3
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