ASAP! GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing.

Answer:
82 degrees.
Step-by-step explanation:
At 4:00 p.m. the temperature, unknown, was at a degree that had dropped by 18, to 64.
According to the information given, you can set the equation up, like so:
x - 18 = 64
All you need to do is add 18 to 64:
x - 18 = 64
+ 18 + 18
__________
x = 82
So, the temperature at 4:00 p.m. was 82 degrees.