Question

В классной комнате было несколько учеников. После того как 8 учеников вошли, а 11 вышли, в комнате их стало 27. Сколько учеников было в классной комнате первоначально?

Answer 1

11-8=3 ученика разница
27+3=30 учеников было в классе
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2 способ
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было х учеников.тогда
х+8-11=27
х=27-8+11
х=30 было в классе

Answer 2

24 человека было первоначально

Answer 3

Problem Analysis

We are given the information that there were initially several students in a classroom. After 8 students entered and 11 students left, there were 27 students in the classroom. We need to determine the initial number of students in the classroom.

Solution

Let's assume the initial number of students in the classroom is x.

According to the given information, after 8 students entered, the number of students in the classroom increased by 8. So, the number of students in the classroom after the entry is x + 8.

After 11 students left, the number of students in the classroom decreased by 11. So, the number of students in the classroom after the exit is (x + 8) - 11.

According to the given information, the number of students in the classroom after the exit is 27. So, we can set up the following equation:

(x + 8) - 11 = 27

Now, we can solve this equation to find the value of x.

Calculation

Let's solve the equation:

(x + 8) - 11 = 27

Simplifying the equation:

x + 8 - 11 = 27

x - 3 = 27

Adding 3 to both sides of the equation:

x = 27 + 3

x = 30

Answer

The initial number of students in the classroom was 30.