2(180n-360/n) =360/ni

Question

This is an equation to solve for n that is the number of sides of A regular polygon

Answer 1

I assume you mean:

2(180-360/n)=360/n.

Divide through by 180:

2(1-2/n)=2/n,

2-4/n=2/n,

2=6/n,

n=6/2=3.

The polygon is a regular trigon, which is an equilateral triangle.