SOLUTION: Stephanie is three times older than her daughter and 10% younger than her sister.If Stephanie's sister is 40 years old,how old is Stephanie's daughter?

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Question 1182897: Stephanie is three times older than her daughter and 10% younger than her sister.If Stephanie's sister is 40 years old,how old is Stephanie's daughter?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Stephanie      40-4=36
Daughter         d
Sister          40

Stephanie is "three times older than" d.
36 is "three times older than" d.

1 time older, is +d.
2 times older, is +2d.
3 times older, 36=d%2B3d
36=4d
highlight%28d=9%29

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Stephanie is three times older than her daughter and 10% younger than her sister.If Stephanie's sister is 40 years old,how old is Stephanie's daughter?
If "Stephanie is three times 'as old' as her daughter", then her daughter is 12 years-old.

However, if "Stephanie is three times 'older' then her daughter", then her daughter is 9 years-old.