SOLUTION: katie is 3 times as old as her son, after fifteen years she will be twice as old as her son. what will be katie age?

Question 698560: katie is 3 times as old as her son, after fifteen years she will be twice as old as her son. what will be katie age?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Katies's age now
Let = Son's age now
= Katie's age in 15 yrs
= Son's age in 15 yrs
------------------------
given:
(1)
(2)
-------------------------
Substitute (1) into (2)
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
Katie is 45, and in 15 yrs, she will be 60
check:
(2)
(2)
(2)
(2)
OK

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