6.2. There were 76 people in two rooms. When 30 people left one room and 40 people left the second room, the number of people remaining in the rooms became equal. How many people were initially in the rooms? (Don't forget to explain your answer.)
Answer: 33 and 43 people. Solution: After 70 people left, 6 people remained in the rooms (3 in each room), which means there were initially $30+3=33$ and $40+3=43$ people in the rooms.

Comment. Correct answer only - 3 points; answer with explanations or calculations leading to the answer - 7 points.