Question 253780
Let x be the required number.
Given, if 6 divided by 1 less than a number gives the same result as 15 divided by twice the same number.
            6/(x-1) = 15/2x
                6*2x=15(x-1)
                 12x= 15x-15
             12x-15x=-15 
                -3x = -15
                  x = (-15)/(-3)
                  x = 5