Answer:
5
Step-by-step explanation:
Answer: 20
C = 5/9 (f - 32)
since f = 68 and substitute it into the equation above
C = 5/9 ( 68 - 32)
C = 5/9 (36)
opening the bracket
C = 5/9 x 36
C = 180/9
C = 20
