Donkeys, horses and mules go to carry tiles. The donkey carries two pieces at a time, the horse carries one piece at a time, and the mule carries three pieces at a time, totaling 100. How to carry them once? The question should be *** 100 donkey, mule and horse, 100 watt, so suppose the donkey is x horse and the y mule is z,

Then 2x+y+z/3= 100.

x+y+z= 100

The final result should be 26 donkeys, 35 horses and 39 mules.