2n+3+n+6=180

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Solution for 2n+3+n+6=180 equation: 



2n+3+n+6=180

We move all terms to the left:

2n+3+n+6-(180)=0

We add all the numbers together, and all the variables

3n-171=0

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

3n=171

n=171/3

n=57

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