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7 September, 00:39

A dictionary cost $24. The total cost of the dictionary and 4 identical diaries is the same as 7 diaries. How much does 1 diary cost?

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  1. 7 September, 03:21
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    Let the price of diaries be x, and set up an equation:

    4x + 24 = 7x

    isolate x by subtracting the 4x over:

    24 = 3x

    Divide by 3:

    x = 8

    The price is $8 per diary
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