In the morning the air temperature was 8 degrees Celsius, by 2 o’clock in the afternoon it rose by 5 degrees

In the morning the air temperature was 8 degrees Celsius, by 2 o’clock in the afternoon it rose by 5 degrees, and then dropped by one degree every hour. what temperature was established by 8 o’clock in the evening

Temperature by 2 pm: 8 + 5 = 13 degrees
Then we subtract 1 degree every hour:
3h: 13-1 = 12
4h: 12-1 = 11
5h: 11-1 = 10
6h: 10-1 = 9
7h: 9-1 = 8
8h: 8-1 = 7
Answer: 7 degrees