At 11:00 pm the temperature was -9 degrees. By 7:00 am the temperature had risen 18 degrees. What was the temperature at 7:00 am.

3 answers

I'll be glad to check your answer.
Right.
At 5:00 AM the temperature was 18 degrees Celsius. At 3:00 PM the temperature was 1 degree Celsius higher. What was the temperature at 3:00 PM?