(2n+20)+(4n+40)=180

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Solution for (2n+20)+(4n+40)=180 equation: 



(2n+20)+(4n+40)=180

We move all terms to the left:

(2n+20)+(4n+40)-(180)=0

We get rid of parentheses

2n+4n+20+40-180=0

We add all the numbers together, and all the variables

6n-120=0

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

6n=120

n=120/6

n=20

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