鸡兔同笼,上有35头,下有94足,问鸡兔各有几只

2025年04月06日 16:30
有3个网友回答
网友(1):

先全部考虑成鸡脚
兔=(94-35X2)÷2=12只
鸡=35-12=23只

网友(2):

鸡有23只,兔有12只。

设:鸡的数量X只,兔的数量35-X,鸡腿2X条,兔腿4(35-X)。

列方程:2X+4(35-X)=94
2X+140-4X=94
140-94=4X-2X
X=23

答:鸡有23只,兔有12只。

此类问题可用数学中的一元一次方程解题,一元一次方程可以解决绝大多数的工程问题、行程问题、分配问题、盈亏问题、积分表问题、电话计费问题、数字问题。

扩展资料

例题:

鸡兔同笼共有32只,共有腿100条,有几只鸡?几只兔?

设:鸡的数量X只,兔的数量32-X,鸡腿2X,兔腿4(32-X)。

列方程     2X+4(32-X)=100

                                    X=14

答:鸡有14只,兔有18只。

参考资料来源:百度百科-一元一次方程

网友(3):

鸡有23只,兔子有12只

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