I have a math problem that I can't understand all the time One day, three people went to play. They stayed in a hotel. The boss said that it would cost 30 yuan to stay in the hotel. As a result, everyone was given 10 yuan. After they left, the boss forgot that there was a discount in the activity Hotel today, so he asked the waiter to get 5 yuan back to them. On the way back, the waiter secretly hid two yuan. One for each of them, that is to say, one for each of them, It's that everyone paid 9 yuan, 3-9 27 plus the waiter's 2 yuan, but it's only 29 yuan

I have a math problem that I can't understand all the time One day, three people went to play. They stayed in a hotel. The boss said that it would cost 30 yuan to stay in the hotel. As a result, everyone was given 10 yuan. After they left, the boss forgot that there was a discount in the activity Hotel today, so he asked the waiter to get 5 yuan back to them. On the way back, the waiter secretly hid two yuan. One for each of them, that is to say, one for each of them, It's that everyone paid 9 yuan, 3-9 27 plus the waiter's 2 yuan, but it's only 29 yuan

This question reflects the logical thinking and classification of mathematics. Read the question carefully, extract the information points, and analyze it first: the boss found that he should give 5 yuan discount on the total 30 yuan, so these three people should only pay 30-5 = 25 yuan, but the waiter hid 2 yuan, that is to say, they actually paid 25 + 2 = 27 yuan. You are wrong here "