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86+n=3n-36
We move all terms to the left:
86+n-(3n-36)=0
We get rid of parentheses
n-3n+36+86=0
We add all the numbers together, and all the variables
-2n+122=0
We move all terms containing n to the left, all other terms to the right
-2n=-122
n=-122/-2
n=+61
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