Question

Одна книга книга дороже второй на 135 рублей . найти стоимость каждой если одна дороже второй на 20% помогите пожалуйстра , зарание спасибо:)

Answer 1

135 рублей = 20%
135/20*100=675 руб- 1 книга
675+135=810 руб- 2 книга

Answer 2

100%:20%=5 раз
135*5=675-стоит 1 книнга
675-135=540-стоит 2 книга
Ответ:675 ,540

Answer 3

Problem Analysis

We are given that the price of one book is 135 rubles more than the price of the other book, and that the first book is 20% more expensive than the second book. We need to find the cost of each book.

Solution

Let's assume the price of the second book is x rubles. According to the given information, the price of the first book is 135 rubles more than the price of the second book, so it can be expressed as (x + 135) rubles.

We are also given that the first book is 20% more expensive than the second book. This can be expressed as:

Price of the first book = Price of the second book + 20% of the price of the second book

Mathematically, this can be written as:

(x + 135) = x + 0.2x

Simplifying the equation:

x + 135 = 1.2x

0.2x = 135

x = 135 / 0.2

x = 675

So, the price of the second book is 675 rubles.

To find the price of the first book, we can substitute the value of x into the equation:

Price of the first book = x + 135 = 675 + 135 = 810 rubles.

Therefore, the cost of the first book is 810 rubles and the cost of the second book is 675 rubles.

Answer

The cost of the first book is 810 rubles and the cost of the second book is 675 rubles.