# Thread: Find the daughters age!

1. ## Find the daughters age!

A man is twice as old as his daughter. 10 years ago, he was three times her age. What is the daughters present age <img src=/S/question.gif border=0 alt=question width=15 height=15>

2. ## Re: Find the daughters age!

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">The daughter's present age is 20.

Let's say she is x years old and her father y years old. We have 2 equations:
y = 2*x
y-10 = 3*(x-10)
We can rewrite the second equation as y = 3*x-20. So 3*x-20 = 2*x, from which we get x = 20 and y = 40. Ten years ago, their ages were 10 and 30.</span hide>

3. ## Re: Find the daughters age!

Morning Hans,
Pretty sharp this morning...
Thats a PERFECT score for the included equation!!! <img src=/S/bravo.gif border=0 alt=bravo width=16 height=30> <img src=/S/bow.gif border=0 alt=bow width=15 height=15>

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