SOLUTION: In 15 years time, I will be 3 times as old as I was 9 years ago. How old am I now?

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Question 437183: In 15 years time, I will be 3 times as old as I was 9 years ago. How old am I now?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
3(m - 9) = m + 15
==> 3m - 27 = m + 15
==> 2m = 42
==> m = 21, your age now.