There are 3 people to take, 30 yuan for one night.
Three people have a 10 yuan for 10 yuan to hand over to the boss.
Later, the boss said that today's discount is enough, it is enough to take 5 yuan ordered service to return to them.
Service students secretly hide 2 yuan,
Then, the remaining 3 yuan is given to those three people, each with a person to 1 yuan.
In this way, the beginning of each person is 10 yuan, now returning 1 yuan, that is, 10-1 = 9, only spend 9 yuan per person
3 people 9 yuan per person, 3 x 9 = 27 yuan service life 2 yuan = 29 yuan, there is a dollar to go? ? ?
