3n+7n+2n=180

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Solution for 3n+7n+2n=180 equation: 



3n+7n+2n=180

We move all terms to the left:

3n+7n+2n-(180)=0

We add all the numbers together, and all the variables

12n-180=0

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

12n=180

n=180/12

n=15

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