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(180(n-2))/n=60
We move all terms to the left:
(180(n-2))/n-(60)=0
Domain of the equation: n!=0We multiply all the terms by the denominator
n∈R
(180(n-2))-60*n=0
We calculate terms in parentheses: +(180(n-2)), so:We add all the numbers together, and all the variables
180(n-2)
We multiply parentheses
180n-360
Back to the equation:
+(180n-360)
-60n+(180n-360)=0
We get rid of parentheses
-60n+180n-360=0
We add all the numbers together, and all the variables
120n-360=0
We move all terms containing n to the left, all other terms to the right
120n=360
n=360/120
n=3
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