SOLUTION: Ben is k years old, how old will he be in 15 years time? How old was he 4 years ago?

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Question 1027225: Ben is k years old, how old will he be in 15 years time? How old was he 4 years ago?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: If he's k years now, next year he'll be k+1 years.
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Or sub a number for k.
Eg, if he's 25 now, etc.....