2n+21=180

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Solution for 2n+21=180 equation: 



2n+21=180

We move all terms to the left:

2n+21-(180)=0

We add all the numbers together, and all the variables

2n-159=0

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

2n=159

n=159/2

n=79+1/2

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