7. The mean of 7,9,x + 3, 12, 2x – 1 and 3 is 9. Find the value of x. ​

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7. The mean of 7,9,x + 3, 12, 2x – 1 and 3 is 9. Find the value of x.

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Ngọc Diệp 3 weeks 2021-08-23T23:14:22+00:00 1 Answers 0 views 0

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    2021-08-23T23:15:45+00:00

    Answer:

    x = 7

    Step-by-step explanation:

    ( 7 + 9 + (x+3) + 12 + ( 2x-3) + 3 ) ÷ 6 = 9

    3x + 33 = 54

    3x = 54 – 33

    3x = 21

    x = 7

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