20=2n+30

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Solution for 20=2n+30 equation: 



20=2n+30

We move all terms to the left:

20-(2n+30)=0

We get rid of parentheses

-2n-30+20=0

We add all the numbers together, and all the variables

-2n-10=0

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

-2n=10

n=10/-2

n=-5

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