SOLUTION: Five years ago, Ked was three time as old as Doy. Five years hence, Ked will be twice as old as Doy. Find their present ages.

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Question 1098832: Five years ago, Ked was three time as old as Doy. Five years hence, Ked will be twice as old as Doy. Find their present ages.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Five years ago,
K-5=3%28D-5%29
K-5=3D-15
1.K-3D=-10
Five years from now,
K%2B5=2%28D%2B5%29
K%2B5=2D%2B10
2.K-2D=5
Subtract 2 from 1,
K-3D-K%2B2D=-10-5
-D=-15
D=15
Now use either equation to solve for K.