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如果用方程很簡單,下麵是算術解法: 雞和兔共有120只,雞比兔多的120只脚對應60只雞,剩下的120-60=60只動物中雞和兔子的脚相同. 而1只兔子4只脚,1只雞2只脚,說明剩下的60只動物中雞是兔子數量的2倍,60/3=20只,這是兔子的數量,共有80只脚.雞的總數是40+60=100只,共有200只脚.
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