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    3. 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
    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

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    0  Views: 2796 Answers: 2 Posted: 11 years ago
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      http://mathisfun.com/

      11 years ago. Rating: 2
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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

        8 years ago. Rating: 2
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