Answer:
Up to 10
Step-by-step explanation:
<u>Inequality:</u>
The missing number is 21
-12 + x = 9
x = 9 + 12
x = 21
The answer is 54
If you follow PEMDAS, and x = 3, then you get 54. As an example, x4 is 12. You change X to 3, then multiply (3)4=12. If you follow the rest of the equation, you get 54.
