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Simplifying D2 + 9d = 20 Solving D2 + 9d = 20 Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-9d' to each side of the equation. D2 + 9d + -9d = 20 + -9d Combine like terms: 9d + -9d = 0 D2 + 0 = 20 + -9d D2 = 20 + -9d Simplifying D2 = 20 + -9d Reorder the terms: -20 + D2 + 9d = 20 + -9d + -20 + 9d Reorder the terms: -20 + D2 + 9d = 20 + -20 + -9d + 9d Combine like terms: 20 + -20 = 0 -20 + D2 + 9d = 0 + -9d + 9d -20 + D2 + 9d = -9d + 9d Combine like terms: -9d + 9d = 0 -20 + D2 + 9d = 0 The solution to this equation could not be determined.
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