140=(n-2)*180/2

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Solution for 140=(n-2)*180/2 equation:


140=(n-2)*180/2

We simplify the equation to the form, which is simple to understand 
140=(n-2)*180/2

Reorder the terms in parentheses
140=(+90n-180)

Remove unnecessary parentheses
140=+90n-180

We move all terms containing n to the left and all other terms to the right. 
-90n=-180-140

We simplify left and right side of the equation. 
-90n=-320

We divide both sides of the equation by -090 to get n. 
n=3.5555555555556

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