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