$$x\neq{y},x\neq\frac{5}{3}$$Quantity A$$(\frac{y}{x-y})-(\frac{x

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$$x\neq{y},x\neq\frac{5}{3}$$

$$(\frac{y}{x-y})-(\frac{x}{x-y})$$

$$(\frac{5}{3x-5})-(3\frac{x}{3x-5})$$

答案：C

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