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23 June, 07:26

A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell a total of 431 boxes of cookies, how many did they sell each week?

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  1. 23 June, 07:50
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    Week 1 = B

    Week 2 = B + 5

    Week 3 = 2 (B + 5)

    Week 1 + Week 2 + Week 3 = 431

    B + (B + 5) + 2 (B + 5) = 431

    B + B + 5 + 2B + 10 = 431

    4B + 15 = 431

    4B = 416

    B = 104

    Week 1 = 104

    Week 2 = 104 + 5

    Week 3 = 2 (104 + 5)

    Week 1 = 104 boxes

    Week 2 = 109 boxes

    Week 3 = 218 Boxes
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