You can put this solution on YOUR website! Let = Harry's age now
Let = Ian's age now
-----------------------------
(1)
(2)
-----------------------------
(2)
(2)
(2)
Substitute (1) into (2)
(2)
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
----------------------
Harry is 45 now
Ian is 25 now
----------------------
check:
(2)
(2)
(2)
(2)
OK