Question 826957: A girl is five years older than a boy. Nine years ago, the boy's age was two thirds the girl's age. The boy's age is...? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = the girl's age now
Let = the boy's age now
-----------------
(1)
(2)
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(2)
(2)
(2)
and
(1)
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Multiply both sides of (1) by
and add the equations
(2)
(1)
and, since
(1)
(1)
(1)
The boys age is 19
check:
(2)
(2)
(2)
(2)
OK
