Help me think about it, thank you

Your explanation of this question is misleading! People with unclear heads are easy to be fooled into by you! It's important for you to get your money back now! But you're ignoring the 25 pieces spent! I'll just change it for you!

At the beginning, I paid 10 yuan per person, and now I have 1 yuan back, that is, 10-1 = 9, and only 9 yuan per person, 9 yuan per person for 3 people, 3 x 9 = 27 yuan.

It costs 25 yuan to open a room!

This is the 2 yuan that was hidden by the waiter!

There is no missing piece!!

According to this line of thought, why not add the 1 yuan returned in each person's hand.

That is, 3 * 9 + 3 * 1 + 2 = 32, doesn't it create a value of 2 yuan? Ha ha.

Hehe! 3 * 9 = 27 paid to the boss, the waiter took 2 of the 27 yuan, the boss that 25 yuan, to add is to add 3 yuan to return. Can this also be stumped?

One of them returned one dollar, that is, each person took out 9 yuan, 3*9=27, no problem, but the boss got 25, and the three of them paid a total of 27, and the waiter stole two dollars, so the two dollars should be subtracted, exactly 25, the same amount of money as the boss got, no problem.

Hello, after the accommodation discount, it is 25 yuan.

The waiter hid 2 yuan.

That's actually spending 25+2=27

Plus the return of 3 yuan is exactly 30 yuan.

3 x 9 = $27 + $2 hidden by the waiter = $29, which is an illusion.

It should be 3 x 9 = 27 yuan - 2 yuan hidden by the waiter = 25 yuan, 27 yuan is paid by the host, and 25 yuan is the boss's income. The other $3 was returned to his possession.

That's it.

In fact, there is no such thing, and it is not right to follow that algorithm! But I don't know exactly how it counts. I'm sorry!

3 x 9 = $27 + $2 from the waiter = $29.

This part of the logic is wrong.

Total amount = Actual amount paid by the Guest (3 x 9) + Refund received by the Guest (3 x 1) or The total amount = the accommodation fee charged by the boss (30-5) + the money returned by the boss (2 secretly left by the waiter + 3*1 by the guest).

Or. The actual amount of money paid by the guest (3*9) = the accommodation fee charged by the boss (30-5) + the fee reserved by the waiter (2).

This is a logical error, the boss took 25 yuan, the waiter stole 2 yuan, returned 3 yuan to the customer, the customer was equivalent to 9 yuan, and 3927 yuan was equivalent to paying the waiter and the boss.

The result is an equation: the square of x plus 64x+448=0 This equation seems to be unsolvable

That is, there was no such year!

d is correct.

a, the mass of sodium hydroxide and potassium hydroxide is equal, the mass of the cation is different.

b、c。The mass of sodium hydroxide and potassium hydroxide is equal, and the mass of the anion is also different. The number also varies.

d。That's right. Mass fraction = solute mass of the solution. And the solute and solvent quality are equal.

Do you need to do 30km Set the distance to be x A and B The speed of two people is y. The formula is: 5y=x; 3(y+4)=x solves y=6;x=30