Question

in a 2 digit no. digit in units place is twice the digit in tens place if 27 is added to it digit are reversed find the no.​

Answer 1

Answer:

Step-by-step explanation:

Let the tens digit of the no be 'x'

Then the units digit of the no is '2x'

The no can be written in the format 10(2x)+x

=20x+x

If we add 27 to it,

It will = 20x + x + 27

= 21x + 27

If we reverse the digits of the original no;

Unit digit=2x

Tens digit=x

The no can be written in the format 10(x)+2x

=10x+2x

=12x

Then equation formed is:

21x - 27 = 12x

21x - 12x = 27

9x = 27

x = 3

Hence, tens digit=3

And, units digit=2x

=2(3)

=6

Ans: the no is 63