Question

За ручку,блокнот,и тетрадь заплатили 42,5 при этом блокнот в 3 раза дороже чем тетрадь, а ручка -в 2 раза дороже чем блокнот.Сколько стоит каждый предмет?

Answer 1

Пусть х - тетрадь, тогда 3х - блокнот, 2 · 3х - ручка. Зная, что за все заплатили 42,5, составим уравнение:
х + 3х + 2 · 3х = 42,5
х + 3х + 6х = 42,5
10х = 42,5
х = 42,5 : 10
х = 4,25 - стоит тетрадь
3 · 4,25 = 12,75 - стоит блокнот
2 · 12,75 = 25,5 - стоит ручка
Проверим себя: 4,25 + 12,75 + 25,5 = 42,5

Answer 2

Тетрадь-х, блокнот-3х, ручка-6х:
х+3х+6х=42,5
х=4,25
Тетрадь-4,25; блокнот-12,75, ручка25,5

Answer 3

Given Information

- The total cost of a pen, notebook, and notepad is 42.5. - The notebook is three times more expensive than the notepad. - The pen is two times more expensive than the notebook.

Solution

Let's assume the cost of the notepad is x. - The cost of the notebook is three times more expensive, so it would be 3x. - The cost of the pen is two times more expensive than the notebook, so it would be 2 * 3x = 6x.

The total cost of all three items is 42.5, so we can write the equation: x + 3x + 6x = 42.5

Simplifying the equation: 10x = 42.5

Dividing both sides by 10: x = 4.25

Now we can find the cost of each item: - The notepad costs x = 4.25. - The notebook costs 3x = 3 * 4.25 = 12.75. - The pen costs 6x = 6 * 4.25 = 25.5.

Therefore, the cost of each item is as follows: - The notepad costs 4.25. - The notebook costs 12.75. - The pen costs 25.5.

Please note that the prices mentioned above are based on the given information and calculations.