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(n+1)+(n+3)-7-2=5
We move all terms to the left:
(n+1)+(n+3)-7-2-(5)=0
We add all the numbers together, and all the variables
(n+1)+(n+3)-14=0
We get rid of parentheses
n+n+1+3-14=0
We add all the numbers together, and all the variables
2n-10=0
We move all terms containing n to the left, all other terms to the right
2n=10
n=10/2
n=5
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