Question

На 2 полках 72 книги причем на первой полке в 3 раза больше чем на второй сколько книг на первой полке

Answer 1

3х+х=72
4х=72
х=72÷4
х=18(к)-на второй полке
18×3=54(к)-на первой полке

Answer 2

Х книг на 2 полке, 3х книг на 1 полке
х+3х=72
4х=72
х=18 книг на 2 полке
18*3=54 книги на 1 полке

Answer 3

Solution:

Let's denote the number of books on the second shelf as x. According to the given information, the number of books on the first shelf is 3 times the number of books on the second shelf. Therefore, the number of books on the first shelf is 3x.

To find the total number of books on both shelves, we can add the number of books on the first shelf to the number of books on the second shelf:

Total number of books = 3x + x = 4x

Now, we know that there are 72 books in total. Therefore, we can solve for x:

4x = 72

x = 72 / 4 = 18

So, there are 18 books on the second shelf.

To find the number of books on the first shelf, we can use the fact that the number of books on the first shelf is 3 times the number of books on the second shelf:

Number of books on the first shelf = 3 * 18 = 54

Answer:

There are 54 books on the first shelf.