420=2n-1

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Solution for 420=2n-1 equation: 



420=2n-1

We move all terms to the left:

420-(2n-1)=0

We get rid of parentheses

-2n+1+420=0

We add all the numbers together, and all the variables

-2n+421=0

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

-2n=-421

n=-421/-2

n=210+1/2

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