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n/2-6=-9
We move all terms to the left:
n/2-6-(-9)=0
We add all the numbers together, and all the variables
n/2+3=0
We multiply all the terms by the denominator
n+3*2=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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