Question

The sum of the digits of a two digit number is 9. The number obtained by interchanging its digits is
9 less than thrice the original number. Find the number.
Solve by One Variable.
please Answer my Question.​

Answer 1

Answer:

27

Step-by-step explanation:

let 2 digits be x,y

sum of digits x+y=9

the number obtained by interchanging the digits

let y be in units place

   x be in tens place

original number is 10*x+y

interchanging number is 10*y+x

the interchanged number is 9 less than trice the original number

3(10*x+y)-(10*y+x)=9

29*x-7*y=9----------------(1)

x+y=9------------------------(2)

by solving (1) and (2)

we get x=2 y=7

finally 27 is the number