Answer: she ordered 27 hamburgers.
Step-by-step explanation: honestly, i just plugged in random numbers. i didn't really use a specific way to solve this, but she ordered 27 hamburgers. if you take the 27 hamburgers plus the 9 cheeseburgers (9 x 3 is 27, that's where i got that), then you get 36. if she ordered 4 more french fries than cheeseburgers, then that means she ordered 13 fries (9 + 4), and 27 + 9 + 13 = 49 items.