21=a^3+b^3+c^3

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Solution for 21=a^3+b^3+c^3 equation:


Simplifying
21 = a3 + b3 + c3

Solving
21 = a3 + b3 + c3

Solving for variable 'a'.

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

Add '-1a3' to each side of the equation.
21 + -1a3 = a3 + b3 + -1a3 + c3

Reorder the terms:
21 + -1a3 = a3 + -1a3 + b3 + c3

Combine like terms: a3 + -1a3 = 0
21 + -1a3 = 0 + b3 + c3
21 + -1a3 = b3 + c3

Add '-21' to each side of the equation.
21 + -21 + -1a3 = b3 + -21 + c3

Combine like terms: 21 + -21 = 0
0 + -1a3 = b3 + -21 + c3
-1a3 = b3 + -21 + c3

Reorder the terms:
-1a3 = -21 + b3 + c3

Divide each side by '-1'.
a3 = 21 + -1b3 + -1c3

Simplifying
a3 = 21 + -1b3 + -1c3

Reorder the terms:
-21 + a3 + b3 + c3 = 21 + -1b3 + -1c3 + -21 + b3 + c3

Reorder the terms:
-21 + a3 + b3 + c3 = 21 + -21 + -1b3 + b3 + -1c3 + c3

Combine like terms: 21 + -21 = 0
-21 + a3 + b3 + c3 = 0 + -1b3 + b3 + -1c3 + c3
-21 + a3 + b3 + c3 = -1b3 + b3 + -1c3 + c3

Combine like terms: -1b3 + b3 = 0
-21 + a3 + b3 + c3 = 0 + -1c3 + c3
-21 + a3 + b3 + c3 = -1c3 + c3

Combine like terms: -1c3 + c3 = 0
-21 + a3 + b3 + c3 = 0

The solution to this equation could not be determined.

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