n*2-n-420=0

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Solution for n*2-n-420=0 equation: 



n*2-n-420=0

We add all the numbers together, and all the variables

-1n+n*2-420=0

Wy multiply elements

-1n+2n-420=0

We add all the numbers together, and all the variables

n-420=0

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

n=420

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