2n+19+5n+21=180

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Solution for 2n+19+5n+21=180 equation: 



2n+19+5n+21=180

We move all terms to the left:

2n+19+5n+21-(180)=0

We add all the numbers together, and all the variables

7n-140=0

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

7n=140

n=140/7

n=20

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