Answer:
The answer to your question is letter C.
Explanation:
Process
1.- Let be the number we are looking for "n".
2.- Twice a number means that number is multiplied by 2: 2n
3.- "is the same as" means equality
4.- 12, number 12
5.- "three times the number" means the number multiplied by 3n
2n = 12 - 3n