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(n+2)+2n=70
We move all terms to the left:
(n+2)+2n-(70)=0
We add all the numbers together, and all the variables
2n+(n+2)-70=0
We get rid of parentheses
2n+n+2-70=0
We add all the numbers together, and all the variables
3n-68=0
We move all terms containing n to the left, all other terms to the right
3n=68
n=68/3
n=22+2/3
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