This is what I think the answer is:
First divide 72 by 2 because Suzie has 12 MORE than TWICE of Sally.
72 / 2 = 36
Now we have 36. Subtract the 12 more from 36 to get Sally's amount of tickets.
36 - 12 = 24
Your expression to represent the number of tickets sold by Sally is:
(72 / 2) - 12
Your expression to find Suzie's tickets is:
(72 / 2) + 12
Your equation for Sally is:
(72 / 2) -12 = 24
Your equation for Suzie is:
(72 / 2)+ 12 = 48
Last but not least, is our answer correct?
Well lets check
Add 48 and 24. What do you get?
72.
Hope this helps! :3