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

(a+0.5)4 multiply with 4
4a + 2

4a+2-2=4a suntracted by 2

4a/2=2a divided by 2

2a=48 equals to 48
a=24