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6 November, 03:09

Danielle is x years old. Her sister is five years older and her brother is half Danielle's age. Write an expression in simplest form for the sum of their ages

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  1. 6 November, 05:53
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    Let x = Danielle, x + 5 = her sister, and. 5x = her brother.

    x + x + 5 +.5x = the sum of their ages.

    Then we simplify to get 2.5x + 5 = the sum of their ages.
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