Need help???????????!!!!!!!!!!!

Answer:
20 degrees
Step-by-step explanation:
F=9/5C+32 (c=Celsius) There are a few ways to do this but im going to do it my way.
68=9/5C+32 (plug in)
36=9/5C (subtract 32 from both sides)
180=9C (multiply by 5)
20=C (divide by 9)