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Simplifying X2 + 2x = 21 Solving X2 + 2x = 21 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2x' to each side of the equation. X2 + 2x + -2x = 21 + -2x Combine like terms: 2x + -2x = 0 X2 + 0 = 21 + -2x X2 = 21 + -2x Simplifying X2 = 21 + -2x Reorder the terms: -21 + X2 + 2x = 21 + -2x + -21 + 2x Reorder the terms: -21 + X2 + 2x = 21 + -21 + -2x + 2x Combine like terms: 21 + -21 = 0 -21 + X2 + 2x = 0 + -2x + 2x -21 + X2 + 2x = -2x + 2x Combine like terms: -2x + 2x = 0 -21 + X2 + 2x = 0 The solution to this equation could not be determined.
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