Introduction - If you have any usage issues, please Google them yourself
Chicken with rabbit cage equation: the number of chickens * 2 + the number of rabbit * 4 = the number of legs
Question: if you know the total number of legs can know the few chicken rabbit
Which leads to the topic: as early as 1500 years ago, ancient Chinese mathematician in \"the grandson is the\" raised the interesting topic, today we will study together.