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2.1n=1.8
We move all terms to the left:
2.1n-(1.8)=0
We add all the numbers together, and all the variables
2.1n-1.8=0
We move all terms containing n to the left, all other terms to the right
2.1n=1.8
n=1.8/2.1
n=1/1.16666666667
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