Answer:
The number is 12
Explanation:
Let the number be x
Triples it,
3x
Add three, and gets 39 as the result.
3x + 3 = 39
3x + 3 - 3 = 39 - 3
3x = 36
3x/3 = 36/3
x = 12
Here,
We assumed Carla's number would be x,
So,
12 × 3 + 3 = 39
36 + 3 = 39
Thus, Carla's number is 12