Question

На двух полках стоит 27 книг. На одной из них книг в 2 раза больше,чем на другой.Сколько книг стоит на каждой полке? Реши задачу по действиям с пояснениями.

Answer 1

X+y=27
X=2y

2y+y=27
Y=27/3
Y=9

X=2*9
X=18

Answer 2

Problem Analysis

We are given that there are 27 books on two shelves. One of the shelves has twice as many books as the other. We need to determine the number of books on each shelf.

Solution

Let's assume the number of books on one shelf is x. According to the problem, the number of books on the other shelf is twice that, so it would be 2x.

We know that the total number of books on both shelves is 27. Therefore, we can write the equation:

x + 2x = 27

Simplifying the equation, we get:

3x = 27

Dividing both sides of the equation by 3, we find:

x = 9

So, there are 9 books on one shelf and 18 books on the other shelf.

Answer

There are 9 books on one shelf and 18 books on the other shelf.

Explanation

Let's verify our answer using the equation we derived earlier. If we substitute the value of x as 9, we get:

9 + 2(9) = 9 + 18 = 27

So, the equation holds true and our answer is correct.