SOLUTION: In eight years, a girl will be three times as old as she was 4years ago.What is her present age?.

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Question 668353: In eight years, a girl will be three times as old as she was 4years ago.What is her present age?.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let her age be x
in eight years she will be (x+8) years
4 years ago she was (x-4) years
(x+8) = 3(x-4)
x+8=3x-12
x-3x=-12-8
-2x=-20
x=-20/-2
x=10
the girl is 10 years now