Question

The tens digit of a two digit number is twice of its unit digit on reversing the digits the number formed is 20 less than the original number find the original number

Answer 1

Step-by-step explanation:

Let unit digit be X

Ten digit =2x

The number=10(2x)+x

=20x+x

=21x

The number formed by reversing the digit of the number=10x+2x

=12x

=21x+20=12x

=21x-12x=-20

=9x=-20

x=-20/9