Question

ЗА ДЕНЬ УЧЕНИК ПРОЧИТАЛ9/13КНИГИ.ЭТО НА 25 СТР БОЛЬШЕ ЧЕМ ПОЛОВИНА КНИГИ .СКОЛЬКО ВСЕГО СТРАНИЦ В КНИГЕ?

Answer 1

1)13*9=117
2)25*2=50
3)117-50=67

Answer 2

Problem Analysis

The problem states that a student has read 9 out of 13 books in a day, and this is 25 pages more than half of the total number of pages in the book. We need to determine the total number of pages in the book.

Solution

Let's assume the total number of pages in the book is x.

According to the problem, the student has read 9 out of 13 books, which means they have read 9/13 of the total number of pages in the book.

We are also given that this is 25 pages more than half of the total number of pages in the book.

Based on this information, we can set up the following equation:

(9/13)x = (1/2)x + 25

To solve for x, we can simplify the equation as follows:

(9/13)x - (1/2)x = 25

Multiplying both sides of the equation by the least common multiple of the denominators (13 and 2), which is 26, we get:

18x - 13x = 650

Simplifying further, we have:

5x = 650

Dividing both sides of the equation by 5, we find:

x = 130

Therefore, the total number of pages in the book is 130.

Answer

The total number of pages in the book is 130.