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Simplifying (X + 5)(x + -9) = 90 Reorder the terms: (5 + X)(x + -9) = 90 Reorder the terms: (5 + X)(-9 + x) = 90 Multiply (5 + X) * (-9 + x) (5(-9 + x) + X(-9 + x)) = 90 ((-9 * 5 + x * 5) + X(-9 + x)) = 90 ((-45 + 5x) + X(-9 + x)) = 90 (-45 + 5x + (-9 * X + x * X)) = 90 (-45 + 5x + (-9X + xX)) = 90 Reorder the terms: (-45 + -9X + 5x + xX) = 90 (-45 + -9X + 5x + xX) = 90 Solving -45 + -9X + 5x + xX = 90 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '45' to each side of the equation. -45 + -9X + 5x + 45 + xX = 90 + 45 Reorder the terms: -45 + 45 + -9X + 5x + xX = 90 + 45 Combine like terms: -45 + 45 = 0 0 + -9X + 5x + xX = 90 + 45 -9X + 5x + xX = 90 + 45 Combine like terms: 90 + 45 = 135 -9X + 5x + xX = 135 Add '-5x' to each side of the equation. -9X + 5x + -5x + xX = 135 + -5x Combine like terms: 5x + -5x = 0 -9X + 0 + xX = 135 + -5x -9X + xX = 135 + -5x Reorder the terms: -135 + -9X + 5x + xX = 135 + -5x + -135 + 5x Reorder the terms: -135 + -9X + 5x + xX = 135 + -135 + -5x + 5x Combine like terms: 135 + -135 = 0 -135 + -9X + 5x + xX = 0 + -5x + 5x -135 + -9X + 5x + xX = -5x + 5x Combine like terms: -5x + 5x = 0 -135 + -9X + 5x + xX = 0 The solution to this equation could not be determined.
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