I can t figure it out, please help 20

Because there are some words here that are misleading:

At first, I paid 10 yuan per person, and now I return 1 yuan, which is 10-1=9, and I only spent 9 yuan per person.

This sentence is not right, the boss said that today's discount, only pay 25 yuan, so in fact, each person paid 25 3 yuan, not 10 yuan, plus 3 yuan recovered, each person paid 28 3 yuan, and the money paid by the three of them plus 2 yuan is exactly 30 yuan.

To put it simply: the three of them paid a total of 25 plus the returned three yuan, and the three of them paid a total of 25 + 3 = 28 yuan, plus the 2 yuan taken by the waiter was exactly 30.

Because the calculation method is wrong!

3 * 9 = 27 yuan already includes the 2 yuan taken by the waiter, why add it!

So don't get out of the way!

This is when the questioner confuses the answerer by stealing concepts, and asks you to point out the mistakes in the question to score points.

The 3 people who stayed took 30 yuan to stay, and the boss only charged 25 yuan for a discount. Note that the accommodation fee is 25 yuan, not 27 yuan. When calculating, the three people who stayed in the hotel thought that the accommodation fee was a total of 27 yuan because they returned 1 yuan each, which in itself did not correspond to the facts, and the result of continuing to calculate according to the way he gave this error was meaningless.

So if you want to ask where the 30 yuan went:

If you ask how much did the accommodation cost:

30-2-1 multiplied by 3=25

Question: 10-1=9

9 times 3+2=?

Note that the 9 multiplied by 3 in this formula is considered to be the accommodation fee spent, plus the waiter's 2 yuan, it is impossible to use the formula 9 times 3+2 to restore the destination of 30 yuan, because the premise is already wrong.

3 people spent 25 yuan (instead of 24 yuan) for the night's stay, with an average of 25 3 yuan per person; After that, they were each withdrawn to 1 yuan, and the actual use per person was 28 3 yuan instead of 27 3 (9) yuan. (The difference of 1 yuan is here.) Plus the waiter's private collection of 2 yuan, a total of 30 yuan.

9 yuan per person for 3 people, 3 x 9 = 27 yuan + 2 yuan from the waiter = 29 yuan"There is a problem, because now the boss receives 25 yuan, so 27-2 = 25

The three of them spent a total of 3*9=27 yuan, of which 25 yuan was the accommodation fee and 2 yuan was the money of the waiter. Why do you need to add 2 yuan?

27 yuan = 25 yuan (boss) + 2 yuan (waiter).

The boss took it, I did this question when I participated in the competition.