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2.45-3.1n=21.05
We move all terms to the left:
2.45-3.1n-(21.05)=0
We add all the numbers together, and all the variables
-3.1n-18.6=0
We move all terms containing n to the left, all other terms to the right
-3.1n=18.6
n=18.6/-3.1
n=-6
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