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12/n-9=-3
We move all terms to the left:
12/n-9-(-3)=0
Domain of the equation: n!=0We add all the numbers together, and all the variables
n∈R
12/n-6=0
We multiply all the terms by the denominator
-6*n+12=0
We add all the numbers together, and all the variables
-6n+12=0
We move all terms containing n to the left, all other terms to the right
-6n=-12
n=-12/-6
n=+2
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