140=(2-n)*180

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



140=(2-n)*180

We move all terms to the left:

140-((2-n)*180)=0

We add all the numbers together, and all the variables

-((-1n+2)*180)+140=0



We calculate terms in parentheses: -((-1n+2)*180), so:

(-1n+2)*180

We multiply parentheses

-180n+360

Back to the equation:

-(-180n+360)



We get rid of parentheses

180n-360+140=0

We add all the numbers together, and all the variables

180n-220=0

We move all terms containing n to the left, all other terms to the right

180n=220

n=220/180

n=1+2/9

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