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

Question 936380: Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother?
Found 3 solutions by josgarithmetic, lwsshak3, MathTherapy:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
m Marry, b Brother

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Answer by lwsshak3(11628)   (Show Source): You can put this solution on YOUR website!
Mary, who is sixteen 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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let x=number of years Mary will be twice as old as her brother

16+x=8+2x
x=8
16+8=24
How old will Mary be when she is twice as old as her brother? 24
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Mary, who is sixteen 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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