SOLUTION: kevin is three times as old as bob. four years ago the sum of their ages was 28. how old is each now?

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Question 961654: kevin is three times as old as bob. four years ago the sum of their ages was 28. how old is each now?
Answer by amarjeeth123(570) About Me  (Show Source):
You can put this solution on YOUR website!
Let Bob's age be x.
Then Kevin's age is 3x.
Four years ago their ages were (x-4) and (3x-4) respectively.
(x-4)+(3x-4)=28
4x-8=28
4x=36
x=9
Bob's age is 9 years and Kevin's age is 27 years.