Question

Реши задачу:на двух полках 84книги,причем на первой полке в 3 раза больше,чем на второй .сколько

Answer 1

Ответ:

Пошаговое объяснение:

пусть на второй х

на первой 3х

х+ 3х= 84 ,4х=84

х=84÷4=21

на первой 3×21=63

на второй 21

Answer 2

Problem Analysis

We are given that there are a total of 84 books on two shelves. The number of books on the first shelf is three times the number of books on the second shelf. We need to find the number of books on each shelf.

Solution

Let's assume the number of books on the second shelf is x. According to the problem, the number of books on the first shelf is three times the number of books on the second shelf, so it would be 3x.

The total number of books on both shelves is given as 84. Therefore, we can write the equation:

x + 3x = 84

Simplifying the equation:

4x = 84

Dividing both sides of the equation by 4:

x = 21

So, there are 21 books on the second shelf. To find the number of books on the first shelf, we can substitute the value of x back into the equation:

3x = 3 * 21 = 63

Therefore, there are 63 books on the first shelf.

Answer

There are 21 books on the second shelf and 63 books on the first shelf.