Question

Для каждого ученика класса купили учебники по математике и учебники по русскому языку.Учебник по математике стоил 45 рублей а учебник по русскому 55 рублей .За всю покупку заплатили 2800 .Сколько учеников в классе?

Answer 1

45+55=100руб - соимость двух учебников

2800/100=28 учеников в классе

Answer 2

45+55р=100р - на одного ученика куплено учебников

2800р:100р= 28 - учеников в классе

Answer 3

Problem Analysis

We are given that textbooks on mathematics and Russian language were purchased for each student in a class. The mathematics textbook cost 45 rubles, and the Russian language textbook cost 55 rubles. The total cost of the purchase was 2800 rubles. We need to determine the number of students in the class.

Solution

Let's assume there are 'x' students in the class.

The total cost of the mathematics textbooks would be 45 rubles multiplied by 'x' students, which is 45x rubles. The total cost of the Russian language textbooks would be 55 rubles multiplied by 'x' students, which is 55x rubles.

According to the given information, the total cost of the purchase was 2800 rubles. Therefore, we can write the equation:

45x + 55x = 2800

Simplifying the equation:

100x = 2800

Dividing both sides of the equation by 100:

x = 2800 / 100

x = 28

Therefore, there are 28 students in the class.

Answer

There are 28 students in the class.