30+n+n=180

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Solution for 30+n+n=180 equation: 



30+n+n=180

We move all terms to the left:

30+n+n-(180)=0

We add all the numbers together, and all the variables

2n-150=0

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

2n=150

n=150/2

n=75

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