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

1)80:5=16(руб)-за тетрадь
2)16*3=48(руб)-за 3 тетради
3)80*2=160(руб)-за 2 книги
4)160+48=208(руб)
Ответ:всего заплатили 208 рублей

Answer 2

Пусть Х рублей стоит тетрадь, теперь составим уравнение Х+5Х=Х+Х+80
Решаем и получаем, что Х=20
Тетрадь стоит 20 рублей, книга-100 рублей. 
3*20+2*100=260

Answer 3

Problem Analysis

We are given that a book is 5 times more expensive than a notebook, and the price difference between the book and the notebook is 80 rubles. We need to find the total cost of 3 notebooks and 2 books.

Solution

Let's assume the price of a notebook is x rubles. Then the price of a book would be 5x rubles.

According to the given information, the price of a book is 80 rubles more than the price of a notebook. So we can write the equation:

5x - x = 80

Simplifying the equation, we get:

4x = 80

Dividing both sides of the equation by 4, we find:

x = 20

Therefore, the price of a notebook is 20 rubles, and the price of a book is 5 times that, which is 100 rubles.

To find the total cost of 3 notebooks and 2 books, we can calculate:

Total cost = (3 notebooks * price per notebook) + (2 books * price per book)

Substituting the values, we get:

Total cost = (3 * 20) + (2 * 100) = 60 + 200 = 260 rubles

So, the total cost of 3 notebooks and 2 books together is 260 rubles.

Answer

The total cost of 3 notebooks and 2 books together is 260 rubles.