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3.9n=2.8
We move all terms to the left:
3.9n-(2.8)=0
We add all the numbers together, and all the variables
3.9n-2.8=0
We move all terms containing n to the left, all other terms to the right
3.9n=2.8
n=2.8/3.9
n=2.8/3.9
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