Question

Dennis thinks of a number. He adds 0.5 to that number and then multiplies the new result by 4. He then subtracts 2 and divides the number by 2. His final answer is 48. What number did Dennis start with?

Answer 1

sentence wise answering

Answer 2

Thank you for asking this question, here is your answer:

Let the number that Dennis thought be x.

He adds 0.5 to it = x +0.5

Multiply the number by 4 = (x+0.5)×4

= 4x + 2

He then subtracts 2 = 4x +2-2

= 4x

Now finally divide by 2 = 4x /2

= 2x

So the final answer is 48

= 2x =48

x = 48/2

= 24

The number that Dennis starts with is 24