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5n=3.55
We move all terms to the left:
5n-(3.55)=0
We add all the numbers together, and all the variables
5n-3.55=0
We move all terms containing n to the left, all other terms to the right
5n=3.55
n=3.55/5
n=2.2903225806452/3.2258064516129
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