Question

Реши задачу.Вычисли и запиши ответ.Книга дороже тетради в 5 раз. За книгу и тетрадь заплатили 120 руб.Сколько всего нужно заплатить за 4 такие тетради и 2 такие книги?

Answer 1

Если книга дороже тетради в 5 раз, то в сумму 120 руб в ходит 1 часть тетрадей и 5 частей книг. 1) 120:6=20(р) стоит 1 тетрадь
 2) 20*5=100(р) стоит одна книга
3) 20*4=80(ру) стоят 4 тетради
4) 100*2=200(руб) стоят 2 книги
5) 80+200=280(руб) Ответ 280 руб стоят 4 тетради и две книги

Answer 2

5x+x=120; 6x=120; X= 20- за одну тетрадь; 5*20=100 за 1 книгу; За 2 книги=200 руб; За 4 тетради=80 руб

Answer 3

Problem Analysis

We are given that the price of a book is 5 times the price of a notebook. The total cost of a book and a notebook is 120 rubles. We need to find the total cost of 4 notebooks and 2 books.

Solution

Let's assume the price of a notebook is x rubles. According to the given information, the price of a book is 5 times the price of a notebook, so the price of a book is 5x rubles.

We know that the total cost of a book and a notebook is 120 rubles. Therefore, we can write the equation:

x + 5x = 120

Simplifying the equation, we get:

6x = 120

Dividing both sides of the equation by 6, we find:

x = 20

Now that we know the price of a notebook is 20 rubles, we can calculate the total cost of 4 notebooks and 2 books.

The total cost of 4 notebooks is:

4 * 20 = 80 rubles

The total cost of 2 books is:

2 * (5 * 20) = 200 rubles

Adding the total cost of notebooks and books, we get:

80 + 200 = 280 rubles

Therefore, the total cost of 4 notebooks and 2 books is 280 rubles.

Answer

The total cost of 4 notebooks and 2 books is 280 rubles.