SOLUTION: Mary is three times as old as her sister. How old will the sister be when Mary is at least 27 years old?

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Question 1152610: Mary is three times as old as her sister. How old will the sister be when Mary is at least 27 years old?
Answer by ikleyn(52803) About Me  (Show Source):
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The sister will be at least 9 years old.     ANSWER