When gwen is twice as old as dean ,then i shall be just 17 . But gwen was 23 when dean was twice as old as me . Thats what bill said. How old was bill when dean was ten.
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Suppose that Bill is x years younger than Dean. Hence after 17 - x years, Dean is 17 + x years old, Bill’s is 17, and Gwen must be 23 + 17 - x or equivalently 40 - x. But we have 40 - x= 2 (17 + x) which provides x equal to 2. Therefore Bill is 8 years old when Dean is 10.
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Therefore Bill is 8 years old when Dean is 10.
Suppose that Bill is x years younger than Dean. Hence after 17 - x years, Dean is 17 + x years old, Bill’s is 17, and Gwen must be 23 + 17 - x or equivalently 40 - x. But we have 40 - x= 2 (17 + x) which provides x equal to 2. Therefore Bill is 8 years old when Dean is 10.
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