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Simplifying X3 + 7x2 + 21x + -15 = 0 Reorder the terms: -15 + X3 + 21x + 7x2 = 0 Solving -15 + X3 + 21x + 7x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '15' to each side of the equation. -15 + X3 + 21x + 15 + 7x2 = 0 + 15 Reorder the terms: -15 + 15 + X3 + 21x + 7x2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + X3 + 21x + 7x2 = 0 + 15 X3 + 21x + 7x2 = 0 + 15 Combine like terms: 0 + 15 = 15 X3 + 21x + 7x2 = 15 Add '-21x' to each side of the equation. X3 + 21x + -21x + 7x2 = 15 + -21x Combine like terms: 21x + -21x = 0 X3 + 0 + 7x2 = 15 + -21x X3 + 7x2 = 15 + -21x Add '-7x2' to each side of the equation. X3 + 7x2 + -7x2 = 15 + -21x + -7x2 Combine like terms: 7x2 + -7x2 = 0 X3 + 0 = 15 + -21x + -7x2 X3 = 15 + -21x + -7x2 Simplifying X3 = 15 + -21x + -7x2 Reorder the terms: -15 + X3 + 21x + 7x2 = 15 + -21x + -7x2 + -15 + 21x + 7x2 Reorder the terms: -15 + X3 + 21x + 7x2 = 15 + -15 + -21x + 21x + -7x2 + 7x2 Combine like terms: 15 + -15 = 0 -15 + X3 + 21x + 7x2 = 0 + -21x + 21x + -7x2 + 7x2 -15 + X3 + 21x + 7x2 = -21x + 21x + -7x2 + 7x2 Combine like terms: -21x + 21x = 0 -15 + X3 + 21x + 7x2 = 0 + -7x2 + 7x2 -15 + X3 + 21x + 7x2 = -7x2 + 7x2 Combine like terms: -7x2 + 7x2 = 0 -15 + X3 + 21x + 7x2 = 0 The solution to this equation could not be determined.
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