Question 339622
Let n = the number we are looking for

24 + (1/2)(n) = 2n

24 + (n/2) = 2n

We now multiply every term by 2 to remove the fraction.

48 + n = 4n

48 = 4n - n

48 = 3n

48/3 = n

16 = n

The number we are looking for is 16.

Understand?