Question

Книга дороже тетради в 5 раз. За книгу заплатили на 80 руб. больше, чем за тетрадь. Сколько нужно заплатить за 3 такие тетради и 2 такие книги вместе?

Answer 1

Смотри прикрепленный рисунок.

Answer 2

Calculating the Total Cost for 3 Notebooks and 2 Books

To calculate the total cost for 3 notebooks and 2 books, we can follow these steps:

1. Determine the Cost of One Notebook - The book is 5 times more expensive than the notebook. - The difference in cost between the book and the notebook is 80 rubles. - We can use this information to find the cost of one notebook.

Calculation: - Let's denote the cost of the notebook as x. - Then, the cost of the book would be 5x. - We have the equation: 5x - x = 80. - Solving for x: - 5x - x = 80 - 4x = 80 - x = 80 / 4 - x = 20

Therefore, the cost of one notebook is 20 rubles. 2. Calculate the Cost of 3 Notebooks - We need to find the total cost for 3 notebooks.

Calculation: - The cost of 3 notebooks is 20 * 3 = 60 rubles.

3. Calculate the Cost of One Book - We know the cost of one book is 5 times the cost of one notebook.

Calculation: - The cost of one book is 20 * 5 = 100 rubles.

4. Calculate the Cost of 2 Books - We need to find the total cost for 2 books.

Calculation: - The cost of 2 books is 100 * 2 = 200 rubles.

Conclusion

Therefore, the total cost for 3 notebooks and 2 books together is 60 rubles for the notebooks and 200 rubles for the books, resulting in a total of 260 rubles.