2 Answers

Vidyesh Churi · Answer 1 · 2021-04-17T20:52:02+0000

Answer:

15 years ago

Explanation:

So it was when Sam was x=3 years old and Bill was 3x=9 years old that Bill was 3 times as old as Sam. And since their ages are now 18 and 24, that was 15 years ago.

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