Question

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

Answer 1

Пусть кол-во тетрадей в клетку=х, тогда тетрадей в линейку=х+4
Составим уравнение:
Х+х+4=12
2х=8
Х=4
Ответ: одна тетрадь стоит 4 р.

Answer 2

1)12:4=3(р.) - цена одной тетради
Ответ: цена одной тетради 3 рубля.

Answer 3

Problem Analysis

The student bought notebooks of 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. The total cost of the ruled line notebooks is 12 rubles more than the total cost of 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 ruled lines is 4 more than the number of notebooks with grid lines. Let's denote the number of notebooks with grid lines as n. Therefore, the number of notebooks with ruled lines is n + 4.

The total cost of the ruled line notebooks is 12 rubles more than the total cost of the grid line notebooks. We can set up the following equation:

x(n + 4) = xn + 12

Simplifying the equation:

xn + 4x = xn + 12

Subtracting xn 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.