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(n-13)/12=3.5
We move all terms to the left:
(n-13)/12-(3.5)=0
We add all the numbers together, and all the variables
(n-13)/12-3.5=0
We multiply all the terms by the denominator
(n-13)-(3.5)*12=0
We add all the numbers together, and all the variables
(n-13)-42=0
We get rid of parentheses
n-13-42=0
We add all the numbers together, and all the variables
n-55=0
We move all terms containing n to the left, all other terms to the right
n=55
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