Question

The total of three sisters' age is 39. Dina is half as old as Michelle and 3 years younger than Juliette. How old are the sisters? Show your work step by step.

Answer 1

Explanation:

Let Dina's age = 1/2 x

Let Michel's age = x

Let Juliette's age = 1/2 x + 3

1/2 + x + 1/2x + 3 = 39

2x + 3 = 39

2x = 39 - 3

2x = 36

x = 18

Dina's age = 1/2 18 = 9

Michelle = 18

Juliet = 1/2 18 + 3 = 12

Total 39