SOLUTION: 5 yrs ago Ben was 2/3 as old as Kris. 10 yrs from now he will be 5/6 as old as Kris. how old are they now.

Question 772280: 5 yrs ago Ben was 2/3 as old as Kris. 10 yrs from now he will be 5/6 as old as Kris. how old are they now.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Ben's age now
Let = Kris's age now
-----------------------
(1)
(2)
-----------------------------
(1)
(1)
(1)
and
(2)
(2)
(2)
--------------------
Multiply both sides of (1) by
and subtract (2) from (1)
(1)
(2)

and, since
(1)
(1)
(1)
(1)
Ben is 15 and Kris is 20
check:
(1)
(1)
(1)
(1)
(1)
OK -you can check other equation

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