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13+m/4=9
We move all terms to the left:
13+m/4-(9)=0
We add all the numbers together, and all the variables
m/4+4=0
We multiply all the terms by the denominator
m+4*4=0
We add all the numbers together, and all the variables
m+16=0
We move all terms containing m to the left, all other terms to the right
m=-16
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