Answer:
The whole number is 11.
Step-by-step explanation:
Let's call the whole number x. We can write the following equation:
2x + 9 = 31
Subtracting 9 from both sides of the equation gives us:
2x + 9 - 9 = 31 - 9
2x = 22
Dividing both sides of the equation by 2 gives us:
2x / 2 = 22 / 2
x = 11
