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12.1=2n-1
We move all terms to the left:
12.1-(2n-1)=0
We get rid of parentheses
-2n+1+12.1=0
We add all the numbers together, and all the variables
-2n+13.1=0
We move all terms containing n to the left, all other terms to the right
-2n=-13.1
n=-13.1/-2
n=6+1/1.8181818181818
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