Or 110
X=
22
x=5
or
The units digit is 5 and therefore the tens digit is
which is 8. The number is 85.
Example 2. Prateek is twice as old as Priya. Five
ago his age was three times Priya's age. Find their pre
ages.
Sol. Let us take Priya's present age to be x years.
Then Prateek's present age would be 2 x years.
Priya's age five years ago was (x - 5) years.
Prateek's age five years ago was (2x-5) years.
It is given that Prateek's age five years ago was three
ya's age. Thus, 2x -5=3(x-5)
2x-5=3x -15
or