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20.4=4n-5
We move all terms to the left:
20.4-(4n-5)=0
We get rid of parentheses
-4n+5+20.4=0
We add all the numbers together, and all the variables
-4n+25.4=0
We move all terms containing n to the left, all other terms to the right
-4n=-25.4
n=-25.4/-4
n=6+1/2.8571428571429
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