SOLUTION: Mary, who is 16 years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother

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Question 1106063: Mary, who is 16 years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: the age difference is 12 years.
When she's 2x as old, it will still be 12 years.