10道奥数题,前7道简单的没法了,后三道难,如果你回答就赚大了,20金币!要会做的来1.若x-y=9,y-z=5,那么2x-2y=?2.一本书,读了45页,总页数是剩下的2.5倍,剩下多少页?3.甲乙两人骑自行车从一环形公路
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![10道奥数题,前7道简单的没法了,后三道难,如果你回答就赚大了,20金币!要会做的来1.若x-y=9,y-z=5,那么2x-2y=?2.一本书,读了45页,总页数是剩下的2.5倍,剩下多少页?3.甲乙两人骑自行车从一环形公路](/uploads/image/z/14908341-21-1.jpg?t=10%E9%81%93%E5%A5%A5%E6%95%B0%E9%A2%98%2C%E5%89%8D7%E9%81%93%E7%AE%80%E5%8D%95%E7%9A%84%E6%B2%A1%E6%B3%95%E4%BA%86%2C%E5%90%8E%E4%B8%89%E9%81%93%E9%9A%BE%2C%E5%A6%82%E6%9E%9C%E4%BD%A0%E5%9B%9E%E7%AD%94%E5%B0%B1%E8%B5%9A%E5%A4%A7%E4%BA%86%2C20%E9%87%91%E5%B8%81%21%E8%A6%81%E4%BC%9A%E5%81%9A%E7%9A%84%E6%9D%A51.%E8%8B%A5x-y%3D9%2Cy-z%3D5%2C%E9%82%A3%E4%B9%882x-2y%3D%3F2.%E4%B8%80%E6%9C%AC%E4%B9%A6%2C%E8%AF%BB%E4%BA%8645%E9%A1%B5%2C%E6%80%BB%E9%A1%B5%E6%95%B0%E6%98%AF%E5%89%A9%E4%B8%8B%E7%9A%842.5%E5%80%8D%2C%E5%89%A9%E4%B8%8B%E5%A4%9A%E5%B0%91%E9%A1%B5%3F3.%E7%94%B2%E4%B9%99%E4%B8%A4%E4%BA%BA%E9%AA%91%E8%87%AA%E8%A1%8C%E8%BD%A6%E4%BB%8E%E4%B8%80%E7%8E%AF%E5%BD%A2%E5%85%AC%E8%B7%AF)
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