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17 June, 16:35

Spencer and Dustin both leave the Internet cafe at the same time, but in opposite directions. If Dustin travels 5 mph faster than Spencer's and after 8 hours they are 264 miles apart, how fast is each traveling?

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  1. 17 June, 17:27
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    Let us say that:

    x = speed of Spencer

    x + 5 = speed of Dustin

    Therefore:

    8 x + 8 (x + 5) = 264

    8 x + 8 x + 40 = 264

    16 x = 224

    x = 14 mph = speed of Spencer

    So speed of Dustin is:

    x + 5 = 19 mph = speed of Dustin
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