Question

В книжном магазине была продажа учебников по математике продали 2865 штук по русскоиу языкк -на 288 штук меньге а по истории- на 78 больге чем по математике и русскому языку вместе .Сколько учебников истрии продано магазином. ПОМОГИТЕ !!!!!

Answer 1

2865 - 288 = 2577 шт . продали по русскому
2865 + 2577 =  5442 шт. по русск. и математике вместе
5442 + 78 =5520 шт. по истории 
 5442 + 5520 = 10962 - продано всего учебников

Answer 2

Calculation of the Number of History Textbooks Sold

To calculate the number of history textbooks sold, we need to consider the information provided in the question.

According to the question, the number of mathematics textbooks sold was 2865, the number of Russian language textbooks sold was 288 less than the mathematics textbooks, and the number of history textbooks sold was 78 more than the mathematics and Russian language textbooks combined.

Let's break down the information:

- Mathematics textbooks sold: 2865 - Russian language textbooks sold: 2865 - 288 = 2577 - History textbooks sold: 2865 + 2577 + 78 = 5520

Therefore, the number of history textbooks sold by the bookstore is 5520.