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26 November, 08:43

Garvey's Electronic store is having a storewide sale. For a television set with a regular price of x dollars, a 15 percent discount is equal to $30. Which of the following equations could not be used to determine x?

0.15x=x-30

0.85x=x-30

x-0.15x=x-30

0.15x=30

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  1. 26 November, 11:21
    0
    With the equation:

    0.15 x = 30

    x = 30 : 0.15 = $200

    A regular price of TV is $200.

    Which could not be used to determine x (we shall plug in the value 200):

    A) 0.15 * 200 = 200 - 30

    30 ≠ 170

    B) 0.85 * 200 = 200 - 30

    170 = 170 (correct)

    C) 200 - 0.15 * 200 = 200 - 30

    200 - 30 = 200 - 30

    170 = 170 (correct)

    D) 0.15 * 200 = 30

    30 = 30 (correct)

    Answer:

    A) 0.15 x = x - 30
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