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Boron is ten years older than his sister. In three years, he will be twice as old as she is now. How old are they now?

Boron is ten years older than his sister. In three years, he will be twice as old as she is now. How old are they now?
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Boron is ten years older than his sister. In three years, he will be twice as old as she is now. How old are they now?

User Panza
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1 Answer

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Boron is 17 and his sister is 7. You know this because half of 20 is 10 and you minus 3 from one of them and take 10 to get the answer^. 
User Arutha
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