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1=n/9=0
We move all terms to the left:
1-(n/9)=0
We add all the numbers together, and all the variables
-(+n/9)+1=0
We get rid of parentheses
-n/9+1=0
We multiply all the terms by the denominator
-n+1*9=0
We add all the numbers together, and all the variables
-1n+9=0
We move all terms containing n to the left, all other terms to the right
-n=-9
n=-9/-1
n=+9
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