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n/2-9=-13
We move all terms to the left:
n/2-9-(-13)=0
We add all the numbers together, and all the variables
n/2+4=0
We multiply all the terms by the denominator
n+4*2=0
We add all the numbers together, and all the variables
n+8=0
We move all terms containing n to the left, all other terms to the right
n=-8
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