21=3n-1

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Solution for 21=3n-1 equation:



21=3n-1
We move all terms to the left:
21-(3n-1)=0
We get rid of parentheses
-3n+1+21=0
We add all the numbers together, and all the variables
-3n+22=0
We move all terms containing n to the left, all other terms to the right
-3n=-22
n=-22/-3
n=7+1/3

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