SOLUTION: Algebra Question: John's age is one third of his dad's age and two fifths of his mother's age.the age difference between his parents is ten years. how old are the three respectivel

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Question 887209: Algebra Question: John's age is one third of his dad's age and two fifths of his mother's age.the age difference between his parents is ten years. how old are the three respectively?
Answer by lwsshak3(11628) About Me  (Show Source):
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Algebra Question: John's age is one third of his dad's age and two fifths of his mother's age.the age difference between his parents is ten years. how old are the three respectively?
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let x=John's age
3x=dad's age
(5/2)x=mother's age
..
3x-5x/2=10
6x-5x=20
x=20
3x=60
(5/2)x=50
John's age=20
dad's age=60
mother's age=50