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