Question

ДАЮ 75 БАЛОВ Два ученика хотели купить книгу стоимость которой превышала количество денег одного участника на 35 копеек другого- на 40 копеек. Когда они отдали все свои деньги то получили сдачу равную 0,4 стоимости книги. Сколько стоила книга.​

Answer 1

40-35ровно 5+4ровно9

Объяснение:

книга стойла 9копеейк

Answer 2

Пусть книга стала х копеек,
Тогда у первого х - 35 копеек, у второго — х - 40
По условию
х - 35 + х - 40 - х = 0,4х
Отсюда
х - 75 = 0,4х
0,6х = 75
х = 125

Ответ: книга стоила 1р. 25коп.

Answer 3

Problem Analysis

Two students wanted to buy a book whose cost exceeded the amount of money one student had by 35 kopecks and the other student had by 40 kopecks. When they gave all their money, they received change equal to 0.4 times the cost of the book. We need to determine the cost of the book.

Solution

Let's assume the cost of the book is x kopecks.

According to the given information: - The first student had x + 35 kopecks. - The second student had x + 40 kopecks.

When they gave all their money, they received change equal to 0.4 times the cost of the book, which is 0.4x kopecks.

We can set up the following equation to solve for x:

(x + 35) + (x + 40) - (0.4x) = x

Simplifying the equation: 2x + 75 - 0.4x = x

Combining like terms: 2x - 0.4x - x = -75

Simplifying further: 0.6x = -75

Dividing both sides by 0.6: x = -75 / 0.6

Calculating the value of x: x = -125

Answer

The cost of the book is -125 kopecks. However, it is important to note that negative values for the cost of an item do not make sense in this context. It is possible that there is an error in the given information or in the calculations. Please double-check the problem statement and the calculations to ensure accuracy.