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21+2(2n-14)=1
We move all terms to the left:
21+2(2n-14)-(1)=0
We add all the numbers together, and all the variables
2(2n-14)+20=0
We multiply parentheses
4n-28+20=0
We add all the numbers together, and all the variables
4n-8=0
We move all terms containing n to the left, all other terms to the right
4n=8
n=8/4
n=2
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