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72/n=4
We move all terms to the left:
72/n-(4)=0
Domain of the equation: n!=0We multiply all the terms by the denominator
n∈R
-4*n+72=0
We add all the numbers together, and all the variables
-4n+72=0
We move all terms containing n to the left, all other terms to the right
-4n=-72
n=-72/-4
n=+18
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