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2.3-3.1n=5.2n-3.9
We move all terms to the left:
2.3-3.1n-(5.2n-3.9)=0
We get rid of parentheses
-3.1n-5.2n+3.9+2.3=0
We add all the numbers together, and all the variables
-8.3n+6.2=0
We move all terms containing n to the left, all other terms to the right
-8.3n=-6.2
n=-6.2/-8.3
n=2.8181818181818/3.7727272727273
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