Question

Количество книг на двух полках было одинаковым.Когда с первый 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

(х-18)*3=х+18
3х+54=х+18
3х-х=18+54
2х=72
х=72:2
х=36 книг было на каждой полке

Answer 2

Problem Analysis

We are given that the number of books on two shelves was initially the same. When 18 books were moved from the first shelf to the second shelf, the number of books on the second shelf became three times the number of books 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 moved from the first shelf to the second shelf, the number