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0.16666666666n+13=20
We move all terms to the left:
0.16666666666n+13-(20)=0
We add all the numbers together, and all the variables
0.16666666666n-7=0
We move all terms containing n to the left, all other terms to the right
0.16666666666n=7
n=7/0.16666666666
n=42+2.800000231673E-10/0.16666666666
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