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    a number x equals 80% of the average oof 5,7,14 and a number y.if the average of x and y is 26,the value of y is

    0  Views: 2811 Answers: 2 Posted: 11 years ago

    2 Answers

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    5 + 7 + 14 = 26.   26 × .8  = 20.8 (80%)


    X = 20.8


    (X + Y) / 2 = 26


    (20.8 + Y) / 2 = 26


    (20.8 + Y) / 2 x 2 = 26 x 2


    20.8 + Y = 52


    20.8 -20.8 + Y = 52 - 20.8


    Y = 31.2


    Check: (20.8 + 31.2) / 2 = 26       52 / 2 = 26



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