SOLUTION: Judy is three times her daughter's age. If the difference between their ages is 30, how old is the daughter?

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Question 549351: Judy is three times her daughter's age. If the difference between their ages is 30, how old is the daughter?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Let D be the daughter's age
Judy+=+3+%2A+D
Judy+-+D+=+30
3D+-+D+=+30
2D+=+30
D+=+15
So Judy is a spry 45 and her daughter is 15