Question

Ученик купил по одинаковой цене тетради в клетку и в линейку.Тетрадей в линейку он купил на 4 больше, чем в клетку,и поэтому заплатил за них на 12р. больше..какова цена тетради.?

Answer 1

12:4=3 р. - цена тетради.

Answer 2

Problem Analysis

The student bought notebooks at the same price, some with grid lines and some with ruled lines. The number of notebooks with ruled lines is 4 more than the number of notebooks with grid lines, and the total cost of the ruled line notebooks is 12 rubles more than the grid line notebooks. We need to find the price of each notebook.

Solution

Let's assume the price of each notebook is x rubles.

The number of notebooks with grid lines is n.

The number of notebooks with ruled lines is n + 4.

The total cost of the grid line notebooks is n * x rubles.

The total cost of the ruled line notebooks is (n + 4) * x rubles.

According to the given information, the total cost of the ruled line notebooks is 12 rubles more than the grid line notebooks:

(n + 4) * x = n * x + 12

Simplifying the equation:

nx + 4x = nx + 12

Subtracting nx from both sides:

4x = 12

Dividing both sides by 4:

x = 3

Therefore, the price of each notebook is 3 rubles.

Answer

The price of each notebook is 3 rubles.