To solve this problem, we can set up an equation based on the information given:
Let's denote the number as x. According to the information provided:
x + 2x = 0.5x + 15
Now, we solve the equation:
3x = 0.5x + 15
3x - 0.5x = 15
2.5x = 15
x = 15 / 2.5
x = 6
Therefore, the number is 6.
