SOLUTION: Bill is three times as old as Mary. Bill is 48. How old will Bill be when he is twice as old as Mary?

Question 920442: Bill is three times as old as Mary. Bill is 48. How old will Bill be when he is twice as old as Mary?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Bill is three times as old as Mary. Bill is 48. How old will Bill be when he is twice as old as Mary?
----------
Equations::
b = 3m
b = 48
----
So 3m = 48
And M = 16 (Mary's age now)
Therefore Bill = 3m = 3*16 = 48 (Bill's age now)
------
Equation::
48+x = 2(16+x)
48+x = 32 + 2x
x = 16 yrs
----
Bill will be twice Mary's age when Bill is 48+16 = 64
Mary will then be 16+x = 16+16 = 32
-------------------------
Cheers,
Stan H.
--------------
RELATED QUESTIONS
Bill is twice as old as Mary. If he is exactly ten years older than Mary was last year,... (answered by richwmiller)

mike is three times as old as his little sister, Mary. in 4 years, he will be twice as... (answered by Alan3354)

Mike is three times as old as his little sister mary. in four years, he will be twice as... (answered by jorel1380)

Mary is twice as old as Samantha. Bill is four years older than Mary. If Samantha is 7... (answered by ewatrrr)

Bill is 3 times as old as Nancy. In 12 years Bill will be twice as old as Nancy.... (answered by stanbon)

Ann and Bill are both celebrating their birthday today. Two years from now Ann will be... (answered by duckness73)

Mary is twice as old as Ann was when Mary was half as old as Ann will be when she is... (answered by Edwin McCravy)

Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be (answered by feliz1965,Fals)

Mary is sixteen years old and is 4 times as old as her brother. How old will Mary be when (answered by Alan3354)