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Simplifying X2 + -4x + -21 = (x + -3) Reorder the terms: -21 + X2 + -4x = (x + -3) Reorder the terms: -21 + X2 + -4x = (-3 + x) Remove parenthesis around (-3 + x) -21 + X2 + -4x = -3 + x Solving -21 + X2 + -4x = -3 + x 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 + X2 + 21 + -4x = -3 + 21 + x Reorder the terms: -21 + 21 + X2 + -4x = -3 + 21 + x Combine like terms: -21 + 21 = 0 0 + X2 + -4x = -3 + 21 + x X2 + -4x = -3 + 21 + x Combine like terms: -3 + 21 = 18 X2 + -4x = 18 + x Add '4x' to each side of the equation. X2 + -4x + 4x = 18 + x + 4x Combine like terms: -4x + 4x = 0 X2 + 0 = 18 + x + 4x X2 = 18 + x + 4x Combine like terms: x + 4x = 5x X2 = 18 + 5x Simplifying X2 = 18 + 5x Reorder the terms: -18 + X2 + -5x = 18 + 5x + -18 + -5x Reorder the terms: -18 + X2 + -5x = 18 + -18 + 5x + -5x Combine like terms: 18 + -18 = 0 -18 + X2 + -5x = 0 + 5x + -5x -18 + X2 + -5x = 5x + -5x Combine like terms: 5x + -5x = 0 -18 + X2 + -5x = 0 The solution to this equation could not be determined.
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