Question

a number becomes double if it is increased by 8.find a number

Answer 1

Let the number be X
A Number becomes double if increased by 8
X+8=2X
2X-X=8
X=8

So,the number is 8.

Verification:
Let us assume that the number is 8.
Add 8 to the same number.
Then 8+8=16
So, when we add 8 to the 8,then the number doubles.
So, the number is "8".