2n+20=4n+40

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Solution for 2n+20=4n+40 equation: 



2n+20=4n+40

We move all terms to the left:

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

We get rid of parentheses

2n-4n-40+20=0

We add all the numbers together, and all the variables

-2n-20=0

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

-2n=20

n=20/-2

n=-10

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