Question

please answer this question​

Answer 1

Let the no. at ones place be x

∴ the no. at tens place = 2x

So, the no. formed = 2x × 10 + x

                               = 20x + x

The new no. formed by reversing the digits = 10x +2x

Difference between the original and the new no. = 36

∴ (20x + x) - (10x + 2x) = 36

  21x  -  12x = 36

             9x  = 36

                x =  36/9

                x = 4

Therefore, the no. at ones place = 4

               And, the no. at tens place = 2 × 4

                                                           =  8

Answer :  84

Hope it will help you...........