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鸡与兔共100只,鸡的腿数比兔的腿数少28条,问鸡与兔各有几只?
参考答案:
设兔有x只,则鸡有100-x只,
4x-(100-x)×2=28,
4x-200+2x=28,
6x=228,
x=38,
100-38=62(只),
答:鸡有62只,兔有38只.
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