笼子里的鸡和兔子同样多,兔子的脚要比鸡的脚多120只.笼子里各有鸡、兔子多少只
人气:272 ℃ 时间:2020-03-21 15:33:54
解答
鸡有:120÷2=60(只)
兔子和鸡同样多,也是60只.设鸡有X只,兔子也是X只4X-2X=1202X=120X=60
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