SOLUTION: Jan is 7 years younger than Lucy and 4 years older than Sam The average of their ages is 16. How old is Jan? Sam? Lucy?

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Question 892461: Jan is 7 years younger than Lucy and 4 years older than Sam The average of their ages is 16. How old is Jan? Sam? Lucy?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Jan is 7 years younger than Lucy and 4 years older than Sam The average of their ages is 16. How old is Jan? Sam? Lucy?
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let x=Jan's age
x+7=Lucy's age
x-4=Sam's age
..
x+(x+7)+(x-4)/3=16
3x+3=48
3x=45
x=15
x+7=22
x-4=11
Jan's age=15
Lucy's age=22
Sam's age=11