Question

Олег купил 4 книги. Все книги без первой стоили 360р.,без второй— 400р., без третьей— 300р., без четвёртой—290р. Сколько стоит каждая книга? (Только краткая запись)

Answer 1

Ответ:

Пошаговое объяснение:

Олег- 4 кн

Все без 1- 360 руб

Все без 2- 400руб

Все без 3- 300руб

Все без 4- 290 руб

Answer 2

1350
Книг даже этого не знай

Answer 3

Calculation of the Cost of Each Book

To determine the cost of each book, we can set up a system of equations based on the given information.

Let's assume the cost of the first book is x rubles.

According to the given information: - The cost of the second book is 400 rubles less than the total cost of the books without the second book, which is 360 rubles. Therefore, the cost of the second book is 360 - 400 = -40 rubles. - The cost of the third book is 300 rubles less than the total cost of the books without the third book, which is 360 rubles. Therefore, the cost of the third book is 360 - 300 = 60 rubles. - The cost of the fourth book is 290 rubles less than the total cost of the books without the fourth book, which is 360 rubles. Therefore, the cost of the fourth book is 360 - 290 = 70 rubles.

Hence, the cost of each book is as follows: - The first book costs x rubles. - The second book costs -40 rubles. - The third book costs 60 rubles. - The fourth book costs 70 rubles.

Please note that the cost of the second book being negative may indicate an error in the given information or calculation.