已知1/x-1/y=4,求(2x+xy-2y)/(x-2xy-y)∵1/x-1/y=4∴(y-x)/xy=4∴y-x=4xy∴x-y=-4xy(y-x)/xy=4是如何求出来的,知道是通分.还有y-x=4xy x-y=-4xy又是如何求出来的?
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![已知1/x-1/y=4,求(2x+xy-2y)/(x-2xy-y)∵1/x-1/y=4∴(y-x)/xy=4∴y-x=4xy∴x-y=-4xy(y-x)/xy=4是如何求出来的,知道是通分.还有y-x=4xy x-y=-4xy又是如何求出来的?](/uploads/image/z/977803-43-3.jpg?t=%E5%B7%B2%E7%9F%A51%2Fx-1%2Fy%3D4%2C%E6%B1%82%282x%2Bxy-2y%29%2F%28x-2xy-y%29%E2%88%B51%2Fx-1%2Fy%3D4%E2%88%B4%28y-x%29%2Fxy%3D4%E2%88%B4y-x%3D4xy%E2%88%B4x-y%3D-4xy%EF%BC%88y-x%EF%BC%89%2Fxy%3D4%E6%98%AF%E5%A6%82%E4%BD%95%E6%B1%82%E5%87%BA%E6%9D%A5%E7%9A%84%2C%E7%9F%A5%E9%81%93%E6%98%AF%E9%80%9A%E5%88%86.%E8%BF%98%E6%9C%89y-x%3D4xy+x-y%3D-4xy%E5%8F%88%E6%98%AF%E5%A6%82%E4%BD%95%E6%B1%82%E5%87%BA%E6%9D%A5%E7%9A%84%3F)
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