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2n=4.2/5
We move all terms to the left:
2n-(4.2/5)=0
We add all the numbers together, and all the variables
2n-(+4.2/5)=0
We get rid of parentheses
2n-4.2/5=0
We multiply all the terms by the denominator
2n*5-4.2=0
Wy multiply elements
10n-4.2=0
We move all terms containing n to the left, all other terms to the right
10n=4.2
n=4.2/10
n=1.9090909090909/4.5454545454545
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