Which of the following equation pairs show examples of an Inverse Function?

A.
20+3=23 and 23-3=20

B.
10*2=20 and 20/2=10

C.
20*2=40 and 40*0.5=20

D.
40/2=20 and 20/0.5=40

E.
30+10=40 and 40-10=30

F.
10*2=20 and 20*0.5=10