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Simplifying (X + 9)(x + -9) = 144 Reorder the terms: (9 + X)(x + -9) = 144 Reorder the terms: (9 + X)(-9 + x) = 144 Multiply (9 + X) * (-9 + x) (9(-9 + x) + X(-9 + x)) = 144 ((-9 * 9 + x * 9) + X(-9 + x)) = 144 ((-81 + 9x) + X(-9 + x)) = 144 (-81 + 9x + (-9 * X + x * X)) = 144 (-81 + 9x + (-9X + xX)) = 144 Reorder the terms: (-81 + -9X + 9x + xX) = 144 (-81 + -9X + 9x + xX) = 144 Solving -81 + -9X + 9x + xX = 144 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '81' to each side of the equation. -81 + -9X + 9x + 81 + xX = 144 + 81 Reorder the terms: -81 + 81 + -9X + 9x + xX = 144 + 81 Combine like terms: -81 + 81 = 0 0 + -9X + 9x + xX = 144 + 81 -9X + 9x + xX = 144 + 81 Combine like terms: 144 + 81 = 225 -9X + 9x + xX = 225 Add '-9x' to each side of the equation. -9X + 9x + -9x + xX = 225 + -9x Combine like terms: 9x + -9x = 0 -9X + 0 + xX = 225 + -9x -9X + xX = 225 + -9x Reorder the terms: -225 + -9X + 9x + xX = 225 + -9x + -225 + 9x Reorder the terms: -225 + -9X + 9x + xX = 225 + -225 + -9x + 9x Combine like terms: 225 + -225 = 0 -225 + -9X + 9x + xX = 0 + -9x + 9x -225 + -9X + 9x + xX = -9x + 9x Combine like terms: -9x + 9x = 0 -225 + -9X + 9x + xX = 0 The solution to this equation could not be determined.
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