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Simplifying (9 + z)(-1u + 9) = 0 Reorder the terms: (9 + z)(9 + -1u) = 0 Multiply (9 + z) * (9 + -1u) (9(9 + -1u) + z(9 + -1u)) = 0 ((9 * 9 + -1u * 9) + z(9 + -1u)) = 0 ((81 + -9u) + z(9 + -1u)) = 0 (81 + -9u + (9 * z + -1u * z)) = 0 Reorder the terms: (81 + -9u + (-1uz + 9z)) = 0 (81 + -9u + (-1uz + 9z)) = 0 (81 + -9u + -1uz + 9z) = 0 Solving 81 + -9u + -1uz + 9z = 0 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-81' to each side of the equation. 81 + -9u + -1uz + -81 + 9z = 0 + -81 Reorder the terms: 81 + -81 + -9u + -1uz + 9z = 0 + -81 Combine like terms: 81 + -81 = 0 0 + -9u + -1uz + 9z = 0 + -81 -9u + -1uz + 9z = 0 + -81 Combine like terms: 0 + -81 = -81 -9u + -1uz + 9z = -81 Add '-9z' to each side of the equation. -9u + -1uz + 9z + -9z = -81 + -9z Combine like terms: 9z + -9z = 0 -9u + -1uz + 0 = -81 + -9z -9u + -1uz = -81 + -9z Reorder the terms: 81 + -9u + -1uz + 9z = -81 + -9z + 81 + 9z Reorder the terms: 81 + -9u + -1uz + 9z = -81 + 81 + -9z + 9z Combine like terms: -81 + 81 = 0 81 + -9u + -1uz + 9z = 0 + -9z + 9z 81 + -9u + -1uz + 9z = -9z + 9z Combine like terms: -9z + 9z = 0 81 + -9u + -1uz + 9z = 0 The solution to this equation could not be determined.
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