Answer:
8
Step-by-step explanation:
plug in the number 4, it would be 5•4-12
Do 5•4=20
20-12=8
I’m a little confused by the question and the problem, is there a picture of the problem you could add?
The number X is placed somewhere between 9 and 10. That's because 9 squared is 81 and 10 squared is 100.