SOLUTION: Sherry is half as old as her mother. Twelve years ago, she was one third of her mother’s age. Find their ages now.

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Question 1168589: Sherry is half as old as her mother. Twelve years ago, she was one third of her mother’s age. Find their ages
now.


Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
If current ages are as d for Sherry and 2d for Mother, then
d-12=%281%2F3%29%282d-12%29
.
.

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

Sherry is half as old as her mother. Twelve years ago, she was one third of her mother’s age. Find their ages
now.
Let Sherry's age be S

Then mother's is: 2S

We then get: 2S - 12 = 3(S - 12)

2S - 12 = 3S - 36

2S - 3S = - 36 + 12

- S = - 24

Sherry's age, or 

You should now be able to find the mother's age!