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数学
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某养殖场兔子跟鸡一共107只,兔腿比鸡腿多56条,问兔子跟鸡各有多少只?
人气：255 ℃ 时间：2019-12-07 11:15:59
解答
设兔子x只,鸡y只
x+y=107
4x-2y=56
解得：x=45y=62
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