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13n-7=2n+12
We move all terms to the left:
13n-7-(2n+12)=0
We get rid of parentheses
13n-2n-12-7=0
We add all the numbers together, and all the variables
11n-19=0
We move all terms containing n to the left, all other terms to the right
11n=19
n=19/11
n=1+8/11
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