Question

Dennis thought of a number. He adds 0.5to that number and then multiplies the new results by 4.he then subtract 2 and divides the number by 2.his final answer is 48.what number did Dennis start with?

Answer 1

let no. be x
(x+0.5)
(x+0.5)×4
4x+2
4x+2-2
4x/2=48
2x=48
x=24
the no. that Dennis thought is 24