3780=(n+-2)*180

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Solution for 3780=(n+-2)*180 equation: 



3780=(n+-2)*180

We move all terms to the left:

3780-((n+-2)*180)=0

We add all the numbers together, and all the variables

-((n-2)*180)+3780=0



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

(n-2)*180

We multiply parentheses

180n-360

Back to the equation:

-(180n-360)



We get rid of parentheses

-180n+360+3780=0

We add all the numbers together, and all the variables

-180n+4140=0

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

-180n=-4140

n=-4140/-180

n=+23

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