SOLUTION: Dorothy is 9 years older than her brother William. If their product of their ages is 360,how old is Dorothy.

SOLUTION: Dorothy is 9 years older than her brother William. If their product of their ages is 360,how old is Dorothy.

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Question 1029441: Dorothy is 9 years older than her brother William. If their product of their ages is 360,how old is Dorothy.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Dorothy's age
Let = William's age
-----------------------
(1)
(2)
Substitute (1) into (2)
(2)
(2)
(2) ( by looking at it )
(2) ( can't use the negative root )
and
(1)
(1)
(1)
Dorothy is 24
---------------
check:
(2)
(2)
(2)
OK
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