2x^3+4=21

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Solution for 2x^3+4=21 equation:


Simplifying
2x3 + 4 = 21

Reorder the terms:
4 + 2x3 = 21

Solving
4 + 2x3 = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + 2x3 = 21 + -4

Combine like terms: 4 + -4 = 0
0 + 2x3 = 21 + -4
2x3 = 21 + -4

Combine like terms: 21 + -4 = 17
2x3 = 17

Divide each side by '2'.
x3 = 8.5

Simplifying
x3 = 8.5

Reorder the terms:
-8.5 + x3 = 8.5 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
-8.5 + x3 = 0.0

The solution to this equation could not be determined.

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