X6-21=-x

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Solution for X6-21=-x equation: 



X6-21=-X

We move all terms to the left:

X6-21-(-X)=0

We add all the numbers together, and all the variables

X6-(-1X)-21=0

We add all the numbers together, and all the variables

X^6-(-1X)-21=0

We get rid of parentheses

X^6+1X-21=0

We do not support eXpression: X^6

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