Question

Количество книг на двух полках было одинаковым. Когда с первой полки переложили 18 книг на вторую, то на второй полке книг стало в 3 раза больше , Чем на первой . Сколько книг было на каждой полке первоначально ?

Answer 1

18*3=54 1полка
54+18=72 2полка

Answer 2

Problem Analysis

We are given that the number of books on two shelves was initially the same. After transferring 18 books from the first shelf to the second shelf, the number of books on the second shelf became three times greater than the number on the first shelf. We need to determine the initial number of books on each shelf.

Solution

Let's assume the initial number of books on each shelf is x.

According to the given information, when 18 books were transferred from the first shelf to the second shelf, the number of books on the second shelf became three times greater than the number on the first shelf. Mathematically, we can represent this as:

x + 18 = 3x

To solve this equation, we can subtract x from both sides:

18 = 2x

Finally, we can divide both sides by 2 to find the value of x:

x = 9

Therefore, the initial number of books on each shelf was 9.

Answer

The initial number of books on each shelf was 9.