You can put this solution on YOUR website! Let = Susie's age now
Let = Lita's age now = Lita's age 4 years ago
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Given:
(1)
(2)
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The wording of this is very important.
When it says " Susie IS 3 times as old as
Lita 4 years ago, I assume I have
to use Susie's present age.
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If it said " Susie WAS 3 times as old as Lita
4 years ago, I would use Susie's age 4
years ago.
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Substitute (2) into (1)
(1)
(1)
(1)
(1)
and, since:
(2)
(2)
(2)
Susie is 9
Lita is 7
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check:
(1)
(1)
(1)
(1)
OK
