Question

За 2 тетради в клетку и 3 тетради в линейку заплатили 99р.Сколько стоит тетрадь в клетку и тетрадь в линейку,если тетрадь в линейку дороже тетради в клетку на 8 рублей

Answer 1

8х3=24руб-больше за 3 тетр.в линейку
99-24=75руб-стоят тетради
2+3=5 тетр-купили всего
75:5=15руб-стоит тетрадь в клетку
15+8=23руб-в линейку
Ответ: 15руб и 23 руб

Answer 2

Problem Analysis

We are given that the cost of 2 notebooks with grid lines (клетку) and 3 notebooks with ruled lines (линейку) is 99 rubles. We also know that the notebook with ruled lines is 8 rubles more expensive than the notebook with grid lines. We need to find the individual prices of the notebooks.

Solution

Let's assume the cost of a notebook with grid lines is x rubles. Since the notebook with ruled lines is 8 rubles more expensive, its cost would be x + 8 rubles.

According to the given information, the cost of 2 notebooks with grid lines and 3 notebooks with ruled lines is 99 rubles. We can set up the following equation to represent this:

2x + 3(x + 8) = 99

Simplifying the equation:

2x + 3x + 24 = 99 5x + 24 = 99 5x = 99 - 24 5x = 75 x = 75 / 5 x = 15

Therefore, the cost of a notebook with grid lines is 15 rubles, and the cost of a notebook with ruled lines is 15 + 8 = 23 rubles.

Answer

The notebook with grid lines costs 15 rubles, and the notebook with ruled lines costs 23 rubles.