SOLUTION: When Lisa was six years old her sister Lucy was half her age. If Lisa is 40 years old today how old is Lucy?

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Question 1158380: When Lisa was six years old her sister Lucy was half her age. If Lisa is 40 years old today how old is Lucy?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Whe Lisa was 6, Lucy was +6%2F2+=+3+ yrs old
The difference in their ages ( 3 yrs ) never changes, so
today Lucy is +40+-+3+=+37+
37 yrs old