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2n+2n+5+2=30+1-2n-2n
We move all terms to the left:
2n+2n+5+2-(30+1-2n-2n)=0
We add all the numbers together, and all the variables
2n+2n-(-4n+31)+5+2=0
We add all the numbers together, and all the variables
4n-(-4n+31)+7=0
We get rid of parentheses
4n+4n-31+7=0
We add all the numbers together, and all the variables
8n-24=0
We move all terms containing n to the left, all other terms to the right
8n=24
n=24/8
n=3
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