SOLUTION:  Stephanie is 3 times as old as Christopher and is also 16 years older than Christopher.
How old is Stephanie?
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Question 1010511:   Stephanie is 3 times as old as Christopher and is also 16 years older than Christopher.
How old is Stephanie? 
Answer by fractalier(6550)   (Show Source): You can put this solution on YOUR website!
 Call their ages, s and c.  Then we have
s = 3c  and
s = c + 16
Set them equal and get
3c = c + 16
2c = 16
c = 8
s = 24 
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