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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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