鹤贵铜龙,鹤比龟多12只,鹤龟足数共72.鹤有几只?龟有几只?.设鹤有X只,则龟有X-12只2X+4(X-12)=722X+4X=72+486X=120X=2020-12=8鹤有20只,龟有8只
https://www.ouer.net/chuzhongshuxue/ww5d.html - 2022-11-05 19:58:01 - 中学数学试题解法一假设鹤有x只,则龟有x+12只得方程x×2+(x+12)×4=72解得:x=4所以鹤有4只,龟有16只解法二龟比鹤多12只,所以龟足比鹤足多12×4=48只所以鹤=(72
https://www.ouer.net/chuzhongshuxue/x0vz.html - 2022-11-13 16:49:29 - 中学数学试题