SOLUTION: Jane is 4 times as old as Karen. Janes age decreased by Karen's age is 21 years. Find their ages

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Question 811536: Jane is 4 times as old as Karen. Janes age decreased by Karen's age is 21 years. Find their ages
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
j=4k
j=k-21
4k=k-21
3k=21
k=7
j=28