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Simplifying (X + 9)(x + 7) = 255 Reorder the terms: (9 + X)(x + 7) = 255 Reorder the terms: (9 + X)(7 + x) = 255 Multiply (9 + X) * (7 + x) (9(7 + x) + X(7 + x)) = 255 ((7 * 9 + x * 9) + X(7 + x)) = 255 ((63 + 9x) + X(7 + x)) = 255 (63 + 9x + (7 * X + x * X)) = 255 (63 + 9x + (7X + xX)) = 255 Reorder the terms: (63 + 7X + 9x + xX) = 255 (63 + 7X + 9x + xX) = 255 Solving 63 + 7X + 9x + xX = 255 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + 7X + 9x + -63 + xX = 255 + -63 Reorder the terms: 63 + -63 + 7X + 9x + xX = 255 + -63 Combine like terms: 63 + -63 = 0 0 + 7X + 9x + xX = 255 + -63 7X + 9x + xX = 255 + -63 Combine like terms: 255 + -63 = 192 7X + 9x + xX = 192 Add '-9x' to each side of the equation. 7X + 9x + -9x + xX = 192 + -9x Combine like terms: 9x + -9x = 0 7X + 0 + xX = 192 + -9x 7X + xX = 192 + -9x Reorder the terms: -192 + 7X + 9x + xX = 192 + -9x + -192 + 9x Reorder the terms: -192 + 7X + 9x + xX = 192 + -192 + -9x + 9x Combine like terms: 192 + -192 = 0 -192 + 7X + 9x + xX = 0 + -9x + 9x -192 + 7X + 9x + xX = -9x + 9x Combine like terms: -9x + 9x = 0 -192 + 7X + 9x + xX = 0 The solution to this equation could not be determined.
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