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180(n-2)/n=177.5
We move all terms to the left:
180(n-2)/n-(177.5)=0
Domain of the equation: n!=0We add all the numbers together, and all the variables
n∈R
180(n-2)/n-177.5=0
We multiply all the terms by the denominator
180(n-2)-(177.5)*n=0
We multiply parentheses
180n-177.5n-360=0
We add all the numbers together, and all the variables
2.5n-360=0
We move all terms containing n to the left, all other terms to the right
2.5n=360
n=360/2.5
n=144
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