求(2X-2Y)(x-2y)=5 (2x+y)(x-2y)+7 xy=x+y 的整数解
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求(2X-2Y)(x-2y)=5 (2x+y)(x-2y)+7 xy=x+y 的整数解
求(2X-2Y)(x-2y)=5 (2x+y)(x-2y)+7 xy=x+y 的整数解
求(2X-2Y)(x-2y)=5 (2x+y)(x-2y)+7 xy=x+y 的整数解
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