SOLUTION: John was twice as old as bob last year. In seven years john will be half again as bob. how old are they now?

Question 476970: John was twice as old as bob last year. In seven years john will be half again as bob. how old are they now?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = John's age now
Let = Bob's age now
given:
(1)
(2)
Note that "half again" means 1.5 times
---------------------------------
(1)
(1)
(1)
and
(2)
(2)
(2)
--------------------------
Add (1) and (2)
(1)
(2)

Plug this result back into (1)
(1)
(1)
(1)
(1)
John is 17 now and Bob is 9 now
check:
(2)
(2)
(2)
(2)
OK

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