There are two examination rooms A and B. If 10 candidates are sent A and B, the number of students in each room is same. If 20 candidates are sent from B to A, the number of students in A is double the number of students in B. Find the number of students in each room.

Explanation

To solve the problem, we will define the variables and set up the equations based on the information provided in the question.

Let:
- \( X \) = the number of students in room A
- \( Y \) = the number of students in room B

### Step 1: Set up the first equation
According to the problem, if 10 candidates are sent from A to B, the number of students in each room will be the same. This can be expressed as:
...