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27 July, 07:07

Harry drove for 3 hours on the freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a country road. If his total trip was 483 miles, then what was his speed on the freeway?

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  1. 27 July, 09:49
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    Х (miles per hour) - his speed

    3x + (x - 20) * 6 = 483

    3x + 6x - 120 = 483

    9x - 120 = 483

    9x = 483 + 120

    9x = 603

    x = 603 : 9

    х = 67 miles per hour - his speed on the freeway - answer.
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