You finish! Answer by amarjeeth123(569) (Show Source): You can put this solution on YOUR website! Let Jillian's present age be x.
Then Ciane's present age is (x+5).
Four years ago their ages were (x-4) and (x+1) respectively.
Four years ago the sum of their ages was (2x-3).
Plugging in the values we get,
2x-3=25
2x=28
x=14
Jillian's present age is 14 years.
Ciane's present age is 19 years.
Validation:
4 years back Jillian's age was 10 years.
4 years back Ciane's age was 15 years.
The sum of their ages 4 years back was 25 years.
Hence the solution is correct.
Let Ciane's age be C
Then Jillian's is: C - 5
Four years ago, Ciane and Jillian were C - 4, and C - 5 - 4, or C - 9, respectively
We then get: C - 4 + C - 9 = 25
2C - 13 = 25
2C = 38
Ciane's age, or
Now, you should be able to find Jillian's age.