There are some people who are working in the hoghouse where there are some pigs.In all there are 22

题目

There are some people who are working in the hoghouse where there are some pigs.In all there are 22
Heads and 72 feet,including all the people and pigs.
How many people and pigs are there in the hothouse?

答案

意思就是一些人在猪圈里面
猪圈里面总共有22个头（包括人和猪的）,72个腿,问有多少人多少猪
设有x人 22-x猪
则2x+4（22-x）=72
x=8,则有8个人14只猪