A number consists of 2 digits whose sum is 9.If 27 is subtracted from the number it's digits are reversed. Find th number

Asked by gopi.pappu9 | 15th Sep, 2020, 07:51: PM

Expert Answer:

 
Let the digit at the ten's place be x → the digit at the unit's place be 9 - x.
 
 
Two digit number = 10x + 9 - x = 9x + 9
 
Accordind to the condition,
 
9x + 9 - 27 = 10(9 - x) + x
→ 9x - 18   = 90 - 9x
→ 18x        = 108
→  x  = 6
Therefore, the two digit number = 9(6) + 9 = 54 + 9 = 63
 

Answered by Yasmeen Khan | 17th Sep, 2020, 02:53: PM