Question

On adding 9 to the twice of a whole number gives 31 .The whole number is

Answer 1

The whole number is 11.

Step-by-step explanation:

Let the whole number be 'a'.

Then, twice the number will be '2a'.

Adding 9 to the number, we will obtain '2a + 9'.

This sum is found to be equal to 31.

So, the equation becomes, 2a + 9 = 31.

Taking 9 on right-hand side and solving for a, we obtain,

2a = 31 - 9

2a = 22

a = 22/2

a = 11