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Asked by Anonymous

Sean is 20 and his brother is 12. How many years ago was Sean three times as old as his brother?
12 years ago

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Answered by PsyDAG
3(12-x) = 20 - x

Solve for x.
12 years ago
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Sean is 20 and his brother is 12. How many years ago was Sean three times as old as his brother?

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