Question

В библиотеку привезли 155 книг. На 3 полки расставили по 30 книг на каждую,а остальные остались в ящике. Сколько книг осталось в ящике? Решить с помощью уровнения.

Answer 1

Пусть х кол - во оставших в коробке книг, тогда создается такле уравнение:

155 - (3 * 30) = х

155 - 90 = х

х = 155 - 90

х = 65 книг ост.

Ответ: в коробке осталось 65 книг

Answer 2

3*30+х=155

х=155-(3*30)

х=155-90

х-65 

Answer 3

Problem Analysis

To solve this problem, we need to determine the number of books that remained in the box after placing 30 books on each of the 3 shelves. We can solve this problem using an equation.

Solution

Let's assume the number of books remaining in the box is represented by the variable x.

According to the given information, 155 books were brought to the library. Out of these, 30 books were placed on each of the 3 shelves, leaving the remaining books in the box.

We can represent this information using the equation:

155 - (30 * 3) = x

Simplifying the equation:

155 - 90 = x

x = 65

Therefore, there are 65 books remaining in the box.

Answer

There are 65 books remaining in the box.