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18 December, 10:11

What is the value of x when X/2=5-x/x-5

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Answers (1)
  1. 18 December, 10:28
    0
    x = 5 - x

    2 x - 5

    2 (5 - x) = x (x - 5)

    10 - 2x = x² - 5x

    10 - 2x = x² - 5x

    + 5x + 5x

    10 + 3x = x²

    0 = x² - 3x - 10

    x² - 3x - 10 = 0

    x = - (-3) + / - √ ((-3) ² - 4 (1) (-10))

    2 (1)

    x = 3 + / - √ (9 + 40)

    2

    x = 3 + / - √ (49)

    2

    x = 3 + / - 7

    2

    x = 1.5 + 3.5

    x = 1.5 + 3.5 x = 1.5 - 3.5

    x = 5 x = - 2

    The value of x is equal to - 2, not 5.
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