90+(n-2)+(n-2)=180

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Solution for 90+(n-2)+(n-2)=180 equation: 



90+(n-2)+(n-2)=180

We move all terms to the left:

90+(n-2)+(n-2)-(180)=0

We add all the numbers together, and all the variables

(n-2)+(n-2)-90=0

We get rid of parentheses

n+n-2-2-90=0

We add all the numbers together, and all the variables

2n-94=0

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

2n=94

n=94/2

n=47

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