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3.13=0.45n
We move all terms to the left:
3.13-(0.45n)=0
We add all the numbers together, and all the variables
-(+0.45n)+3.13=0
We get rid of parentheses
-0.45n+3.13=0
We move all terms containing n to the left, all other terms to the right
-0.45n=-3.13
n=-3.13/-0.45
n=6+0.43/0.45
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