Question

dennis thinks a number.he adds 0.5 to that no. and multiplies the new result by 4.he then subtracts 2 and divided the no. by 2.his final answer is 4.what no. with dennise starts with?

Answer 1

let the number be x
x+0.5
(x+0.5)×4=4x+2
(4x+2)-2=4x-2
4x-2÷4=x-2