Question 780214
A man is nine times as old as his son. In nine years, he will be only three times as old as his son. How old are each now? 
Please use the variables:
F = Age of father now
S = Age of son
***
F=9S
In 9 yrs:
F+9=Age of father now
S+9=Age of son now
..
F+9=3(S+9)
F+9=3S+27
9S+9=3S+27
6S=18
S=3
F=9S=27
Age of father now=27
Age of son now=3