2n+21+3n+19=180

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Solution for 2n+21+3n+19=180 equation: 



2n+21+3n+19=180

We move all terms to the left:

2n+21+3n+19-(180)=0

We add all the numbers together, and all the variables

5n-140=0

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

5n=140

n=140/5

n=28

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