Question

На полке было 12 книг. Несколько книг взяли с полки . После этого осталось на 4 книги больше, чем взяли. Сколько книг взяли с полки?

Answer 1

Было - 12 кн.
Взяли - х кн.
Осталось - (х + 4) кн.
х + (х + 4)=12
х+ х + 4=12
2х + 4 = 12
2х = 12-4
2х = 8
х = 8:2
х = 4 (кн.)
Ответ: 4 книги взяли с полки.

Answer 2

Х - кол-во книг, взятых с полки
тогда х + 4 - кол-во книг, оставшихся на этой же полке
но всего книг 12
тогда 
х+х+4=12
2х=8
х=4
ответ: взяли 4 книги

Answer 3

Problem Analysis

We are given that there were initially 12 books on a shelf. Some books were taken from the shelf, and after that, there were 4 more books left on the shelf than were taken. We need to determine how many books were taken from the shelf.

Solution

Let's assume that x books were taken from the shelf. According to the given information, after the books were taken, there were 4 more books left on the shelf than were taken. This can be expressed as:

12 - x = x + 4

Simplifying the equation, we get:

12 - x = x + 4 12 - 4 = x + x 8 = 2x x = 8/2 x = 4

Therefore, 4 books were taken from the shelf.

Answer

The number of books taken from the shelf is 4.