Hello,
The inverse operation's are easy.
is would be h/3-8=19
Hope this helps
Answer is C
I did it before
1 x 9, 3 x 3, 9 x 1
1 and 9 are a factor pair of 9 since 1 x 9= 9
3 and 3 are a factor pair of 9 since 3 x 3= 9
9 and 1 are a factor pair of 9 since 9 x 1= 9