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Mathematics, 01.08.2019 21:30 Mypage22

David is twice as old as sara, and jessica is three times as old as sara. if their ages add up to 30, how old is david? x = sara's age 2x = david's age 3x = jessica's age

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David is twice as old as sara, and jessica is three times as old as sara. if their ages add up to 30...

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