Question

На 1 полке лежит в 4 раза больше книг чем на второй.Это на 12 больше чем на второй полке. Сколько книг на каждой полке?

Answer 1

X=y*4
x=y+12
4y=y+12
4y-y=12
3y=12
y=12/3=4 - на 2-й
x=4*4=16 - на 1-й

Answer 2

12:3=4 кн. на второй полке.
4 умножить на 4 = 16 кн. на первой полке.

Answer 3

Problem Analysis

We are given that there are four times as many books on the first shelf as there are on the second shelf, and that the number of books on the first shelf is 12 more than 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 second shelf is x. According to the given information, the number of books on the first shelf is four times the number of books on the second shelf, which can be expressed as 4x. Additionally, we are told that the number of books on the first shelf is 12 more than the number of books on the second shelf.

We can set up the following equation to represent the given information:

4x = x + 12

To solve for x, we can subtract x from both sides of the equation:

4x - x = x + 12 - x

Simplifying the equation gives us:

3x = 12

Dividing both sides of the equation by 3 gives us:

x = 4

Therefore, there are 4 books on the second shelf.

To find the number of books on the first shelf, we can substitute the value of x into the equation 4x:

4 * 4 = 16

Therefore, there are 16 books on the first shelf.

Answer

There are 4 books on the second shelf and 16 books on the first shelf.