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25 January, 10:15

Students sold yogurt to raise money for graduation. The first 20 yogurts sold cost $5 each. To sell more yogurt they lowered the cost to $4 each. If they raised $216, how many yogurts did they sell in all?

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  1. 25 January, 10:31
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    5 (20) + 4y = 216

    100 + 4y = 216

    4y = 216 - 100

    4y = 116

    y = 116/4

    y = 29 ... so they sold 29 four-dollar yogurts + 20 five-dollar yogurts ... for a total of 49 yogurts sold <==
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