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2n+n-2.2=9.3
We move all terms to the left:
2n+n-2.2-(9.3)=0
We add all the numbers together, and all the variables
3n-11.5=0
We move all terms containing n to the left, all other terms to the right
3n=11.5
n=11.5/3
n=3+2.5/3
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