3n+20+4n+13=180

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Solution for 3n+20+4n+13=180 equation: 



3n+20+4n+13=180

We move all terms to the left:

3n+20+4n+13-(180)=0

We add all the numbers together, and all the variables

7n-147=0

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

7n=147

n=147/7

n=21

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