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90/n=18
We move all terms to the left:
90/n-(18)=0
Domain of the equation: n!=0We multiply all the terms by the denominator
n∈R
-18*n+90=0
We add all the numbers together, and all the variables
-18n+90=0
We move all terms containing n to the left, all other terms to the right
-18n=-90
n=-90/-18
n=+5
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