Question

a number consist of two digit . the digit at the tens place is twice that of the digit at unit place if 18 is subtracted from the number .the digit are reversion .find the number.

Answer 1

it's your solution.kindly note it.

Answer 2

Answer:

Step-by-step explanation:

Let first digit be y & second be x then number  

Let digit of unit place be x the number

= 10x+y

=x=2y  

From question

10x+y+18=10y+x

 Substitute x=2y here we get  

10(2y) +y-18=10y+2y

21y – 12y = 18

9y=18

Y=2

So, 2 x 2=4  

So no. is 42