n+n+1=21

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Solution for n+n+1=21 equation:



n+n+1=21
We move all terms to the left:
n+n+1-(21)=0
We add all the numbers together, and all the variables
2n-20=0
We move all terms containing n to the left, all other terms to the right
2n=20
n=20/2
n=10

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