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6=+51-2n
We move all terms to the left:
6-(+51-2n)=0
We add all the numbers together, and all the variables
-(-2n+51)+6=0
We get rid of parentheses
2n-51+6=0
We add all the numbers together, and all the variables
2n-45=0
We move all terms containing n to the left, all other terms to the right
2n=45
n=45/2
n=22+1/2
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