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18 December, 14:07

Susan, Reuben, and Chris served a total of 99 orders Monday at the school cafeteria. Reuben served 6 fewer orders than Susan. Chris served 3 times as many orders as Susan. How many orders did they each serve?

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  1. 18 December, 14:34
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    Susan: 21

    Reuben: 15

    Chris: 63

    Step-by-step explanation:

    Susan: s

    Reuben: s - 6

    Chris: 3s

    s + s - 6 + 3s = 99

    5s - 6 = 99

    5s = 105

    s = 21

    21 - 6 = 15

    3 (21) = 63

    63 + 15 + 21 = 99
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