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9+n/8=57
We move all terms to the left:
9+n/8-(57)=0
We add all the numbers together, and all the variables
n/8-48=0
We multiply all the terms by the denominator
n-48*8=0
We add all the numbers together, and all the variables
n-384=0
We move all terms containing n to the left, all other terms to the right
n=384
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