Question

The total of three sister's ages is 39. Jennifer is half as old as Denise and 3 years younger than Anne.

How old are the sisters? Write a formula to show this.

Answer 1

9 yr = jennifer's age

18 yr = denise's age

12 yr = anne'e age

Explanation:

Let x = jennifer's age

then 2x = denise's age

and x + 3 = anne'e age

x + 2x + x + 3 = 39

4x + 3 = 39

4x = 36

x = 9 yr = jennifer's age

2x = 18 yr = denise's age

x + 3 = 12 yr = anne'e age