SOLUTION: A father is three times as old as the son. Nine years ago the father was four timesas old as the son find the present ages

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Question 1053216: A father is three times as old as the son. Nine years ago the father was four timesas old as the son find the present ages
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
F=3S
Nine years ago,
F-9=4%28S-9%29
F-9=4S-36
F=4S-27
Substituting from above,
3S=4S-27
-S=-27
S=27
So,
F=3%2827%29
F=81