Answer:
22°C
Step-by-step explanation:
(16 + 20 + 24 + 28 + 28 + 23 + 15)/7 = 22°C
For this case we have the following inequality:

We multiply both sides of the equation by -1.
By doing this, change the symbol of the inequality.
We have then:

From here, we clear the value of x.
We have then:
Answer:
The solution set is:
{x | x R, x < -12}