SOLUTION: Mary�s father is four times as old as Mary. Five years ago, he was seven times as old. How old is each now?

Question 1051724: Mary�s father is four times as old as Mary. Five years ago, he was seven times as old. How old is each now?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Mary's age now
Let = her father's age now
---------------------------------
(1)
(2)
---------------------------
Substitute (1) into (2)
(2)
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
----------------
Mary is 10
Her father is 40
----------------
check:
(2)
(2)
(2)
(2)
OK
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