The real-world problem that could be solved with the sum \(-22 + 9\) is:
The temperature was −22°F yesterday. Today the temperature is 9°F. How much warmer is it today compared with yesterday?
This problem involves finding the difference in temperature between the two different days, which is represented by the sum of \(-22\) (yesterday's temperature) and \(9\) (today's temperature). The result will give the amount of warmth gained.