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