x^3+3x=21

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Solution for x^3+3x=21 equation: 


Simplifying
x3 + 3x = 21

Reorder the terms:
3x + x3 = 21

Solving
3x + x3 = 21

Solving for variable 'x'.

Reorder the terms:
-21 + 3x + x3 = 21 + -21

Combine like terms: 21 + -21 = 0
-21 + 3x + x3 = 0

The solution to this equation could not be determined.

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