Does anyone know what Rei did before she joined the association? As the title suggests, thank you

It seems to have been sent to a child abuse organization. There is a group of uncles loli control. It's definitely miserable. I heard that there is an explanation in the 3rd, but the crack has not been played yet.

On the 2nd floor, the name of the Star Gate is "Girl Paradise Lost", thank you.

Xiao Ling participated in the mathematics competition, with a total of 18 questions in the whole volume, and Xiao Ling only got the meaning of 8/99/9 of the total number of questions right: divide a thing into 9 parts, and take the 8 parts of it with the right to do it, which is called 8/9. For example, if 18 is divided into 9 parts, then each part is 2, then 8 parts are 16. Note:

When dividing something into several portions, we stipulate that it be divided equally, with the same amount in each portion. When dividing something into 9 parts, we prescribe that it is represented by " ", " the number below is the total number of parts, and the number above " is the number of parts, e.g. 8 9 is used to represent 8 out of 9 parts. In addition:

We use 8 9*18 to divide 18 into 9 parts, and we take 8 of them. *The number following indicates the object that is divided into parts.

Do 18*8 9=16 questions correctly.

So I got 18-16=2 questions wrong.

Let's assume that Xiaoling only gets x% of the total number of questions right.

Then Xiaoling got 18* (1-x%) questions wrong.

Didn't read it. I would appreciate additional explanations.

Two-thirds of what has been done before the Spring Festival is not done, then two-fifths of the total number has been done before the Spring Festival; Three-quarters of what has been done before the Spring Festival is not done, then three-sevenths of the total number has been done before the Spring Festival. Three-sevenths minus two-fifths equals one-thirty-fifth, which is four questions. Then the total is four divided by thirty-five one, which equals one hundred and forty questions.

Let the undone title be x, then according to what has been done is two-thirds of what has not been done, 2 3x has been done, and 4 more questions have been done on the fourth day of the first lunar month, at this time it has been done 2 3x+4, and what has not been done is x-4, and then according to the three-quarters that has not been done at this time, the column equation: 2 3x+4=3 4 (x-4), solved, x=84, 2 3x=56, so a total of 140 questions!

If the X path that has not been done before the Spring Festival is solved, it will be 2 3x if it has been done, and the (2 3x+4) path that has been done on the fourth day of the first lunar month will not be done (x-4). According to the equation of three-quarters of the column that has been done and has not been done, (2 3x+4) = 3 4 (x-4) and then the equation x = 84 is solved, then 2 3x = 56, so there is a total of 84 + 56 = 140 (dao).

I'm here to help you out. Let's build a system of binary equations. First of all, we set what we have done before the Spring Festival as x, and what we have not done will naturally be y

So there's x 2 3 y at this point

On the fourth day of the first month, it has been done with x 4. . .

At this point there is x 4 3 4 (y 4).

From these two, it can be calculated that a total of 140 pulls should be made. where x is 84

If you don't do it before the Spring Festival, you will do 2 3x, for a total of 5 3x, which can be listed according to the latter condition.

2 3 x + 4 = 3 4 (x-4), solved.

x=84, so there are 140 in total.

If you don't do x questions for the first time, you can solve the equation 2 3x+4=3 4 (x-4) to get x=84 84*2 3+84=140 and do a total of 140 questions.