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21.4=5n-2
We move all terms to the left:
21.4-(5n-2)=0
We get rid of parentheses
-5n+2+21.4=0
We add all the numbers together, and all the variables
-5n+23.4=0
We move all terms containing n to the left, all other terms to the right
-5n=-23.4
n=-23.4/-5
n=4+2.42857142857/3.57142857143
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