SOLUTION: 3. The sum of the ages of Daniel and Ann is 25. Five years ago David was four times as old as Ann. How old are they now?

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Question 955263: 3. The sum of the ages of Daniel and Ann is 25. Five years ago David was four times as old as Ann. How old are they now?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
D%2BA=25
.
.
.
%28D-5%29=4%28A-5%29
D-5=4A-20
D-4A=-15
Subtracting eq. 1 from eq. 2,
D-4A-D-A=-15-25
-5A=-40
A=8
Then,
D%2B8=25
D=17