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