SOLUTION: in fifteen barnie will be fourtimes as old as she was nine years ago.how old is she now.

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Question 578117: in fifteen barnie will be fourtimes as old as she was nine years ago.how old is she now.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
In fifteen years, Barnie will be four times as old as she was nine years ago.
how old is she now.
:
Let a = her age now
:
a + 15 = 4(a - 9)
a + 15 = 4a - 36
15 + 36 = 4a - a
51 = 3a
a = 51/3
a = 17 yrs is her age now
;
:
See if that checks out:
17 + 15 = 4(17-9)
32 = 4(8); looks right, doesn't it.