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Simplifying X4 + -20x2 + -21 = 0 Reorder the terms: -21 + X4 + -20x2 = 0 Solving -21 + X4 + -20x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '21' to each side of the equation. -21 + X4 + 21 + -20x2 = 0 + 21 Reorder the terms: -21 + 21 + X4 + -20x2 = 0 + 21 Combine like terms: -21 + 21 = 0 0 + X4 + -20x2 = 0 + 21 X4 + -20x2 = 0 + 21 Combine like terms: 0 + 21 = 21 X4 + -20x2 = 21 Add '20x2' to each side of the equation. X4 + -20x2 + 20x2 = 21 + 20x2 Combine like terms: -20x2 + 20x2 = 0 X4 + 0 = 21 + 20x2 X4 = 21 + 20x2 Simplifying X4 = 21 + 20x2 Reorder the terms: -21 + X4 + -20x2 = 21 + 20x2 + -21 + -20x2 Reorder the terms: -21 + X4 + -20x2 = 21 + -21 + 20x2 + -20x2 Combine like terms: 21 + -21 = 0 -21 + X4 + -20x2 = 0 + 20x2 + -20x2 -21 + X4 + -20x2 = 20x2 + -20x2 Combine like terms: 20x2 + -20x2 = 0 -21 + X4 + -20x2 = 0 The solution to this equation could not be determined.
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