90+2n=180

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Solution for 90+2n=180 equation: 



90+2n=180

We move all terms to the left:

90+2n-(180)=0

We add all the numbers together, and all the variables

2n-90=0

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

2n=90

n=90/2

n=45

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