1.设有x只鸡,(36-x)只兔.
则,2x+4(36-x)=50x2
2x+144-4x=100
44=2x
x=22
36-22=14
答:有22只鸡,14只兔
2.设大卡车装x吨,小卡车装(x-4)吨
则,36x=45(x-4)
36x=45x-180
180=9x
x=20 20x36=720
答:这堆沙子有720吨
1.设有x只鸡,(36-x)只兔.
则,2x+4(36-x)=50x2
2x+144-4x=100
44=2x
x=22
36-22=14
答:有22只鸡,14只兔
2.设大卡车装x吨,小卡车装(x-4)吨
则,36x=45(x-4)
36x=45x-180
180=9x
x=20 20x36=720
答:这堆沙子有720吨