Question

В трех пачках 45 книг. В первой пачке на 5 книг больше, чем во второй, а в третьей пачке втрое больше книг, чем во второй. Сколько книг в каждой пачке?

Answer 1

Первый х+5
второй х
третий 3*х
всего 45
РЕШЕНИЕ:
х+5+х+3х=45
5х+5=45
5х=45-5
х= 40/5
х= 8

Answer 2

Problem Analysis

We are given three packs of books, and we need to determine the number of books in each pack. The first pack has 5 more books than the second pack, and the third pack has three times the number of books as the second pack.

Solution

Let's assume the number of books in the second pack is x.

According to the given information: - The first pack has 5 more books than the second pack, so the number of books in the first pack is x + 5. - The third pack has three times the number of books as the second pack, so the number of books in the third pack is 3x.

To find the total number of books in all three packs, we can add the number of books in each pack:

x + (x + 5) + 3x = 45

Simplifying the equation:

5x + 5 = 45

Subtracting 5 from both sides:

5x = 40

Dividing both sides by 5:

x = 8

Therefore, there are 8 books in the second pack.

To find the number of books in the first pack, we can substitute the value of x into the equation:

x + 5 = 8 + 5 = 13

Therefore, there are 13 books in the first pack.

To find the number of books in the third pack, we can substitute the value of x into the equation:

3x = 3 * 8 = 24

Therefore, there are 24 books in the third pack.

Answer

There are 13 books in the first pack, 8 books in the second pack, and 24 books in the third pack.