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n/3+20=18
We move all terms to the left:
n/3+20-(18)=0
We add all the numbers together, and all the variables
n/3+2=0
We multiply all the terms by the denominator
n+2*3=0
We add all the numbers together, and all the variables
n+6=0
We move all terms containing n to the left, all other terms to the right
n=-6
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