Question

a number is as much greater than 21 as it is less than 71

Answer 1

Let the number be x.

Given, x - 21 = 71 - x            -------------------- (1)

            x + x = 71 + 21

              2x = 92

                 x = 46.

Substitute x in (1), we get

                46 - 21 = 25 

                71 - 46 = 25.

So, the number is 46.

Hope this helps!