Question

на двух полках стоят 36 книг.если с одной полки переложить на вторую 4 книги,то на первой полке станет книг в 2 раза меньше,чем на второй.сколько книг было на каждой полке?

Answer 1

на одной полке было 16 книг на ругой 20 потом с одной переставили на другую 4 книги и на одной стало 12 книг а на другой 24 книги .

ответ 16 и 24 книги.

Answer 2

Problem Analysis

We are given that there are 36 books on two shelves. If we move 4 books from one shelf to the other, the number of books on the first shelf will be half the number of books on the second shelf. We need to determine the number of books on each shelf.

Solution

Let's assume the number of books on the first shelf is x and the number of books on the second shelf is y.

According to the given information, we have the following equations: 1. x + y = 36 (since there are 36 books in total) 2. x - 4 = (y + 4) / 2 (since the number of books on the first shelf will be half the number of books on the second shelf after moving 4 books)

We can solve these equations to find the values of x and y.

Solving the Equations

Let's solve the equations using substitution or elimination method.

From equation 1, we have: x = 36 - y

Substituting this value of x in equation 2, we get: 36 - y - 4 = (y + 4) / 2

Simplifying the equation: 32 - y = (y + 4) / 2 Multiplying both sides by 2 to eliminate the fraction: 64 - 2y = y + 4 Bringing all the terms involving y to one side: 3y = 60 Dividing both sides by 3: y = 20

Substituting the value of y in equation 1, we get: x + 20 = 36 x = 36 - 20 x = 16

Answer

Therefore, there were 16 books on the first shelf and 20 books on the second shelf.

Note: The solution provided above is based on the given information and the assumption that the number of books on the first shelf will be half the number of books on the second shelf after moving 4 books.

Answer 3

Я могу помочь вам решить эту задачу.

Пусть на первой полке было x книг, а на второй - y книг. Тогда, по условию задачи, мы можем составить следующее уравнение:

x - 4 = 2 * (y + 4)

Решая это уравнение, мы получаем:

x - 4 = 2y + 8

x - 2y = 12

x = 2y + 12

Подставляя это в условие, что на двух полках стоят 36 книг, мы получаем:

2y + 12 + y = 36

3y = 24

y = 8

Тогда x = 2y + 12 = 2 * 8 + 12 = 28

Ответ: на первой полке было 28 книг, а на второй - 8 книг.