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5-m/9=12
We move all terms to the left:
5-m/9-(12)=0
We add all the numbers together, and all the variables
-m/9-7=0
We multiply all the terms by the denominator
-m-7*9=0
We add all the numbers together, and all the variables
-1m-63=0
We move all terms containing m to the left, all other terms to the right
-m=63
m=63/-1
m=-63
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