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13 November, 17:20

Four times a number decreased by 25

is the same as 9 times the number.

Find the number.

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Answers (1)
  1. 13 November, 20:48
    0
    4x - 25 = 9x

    9x - 4x = - 25

    5x = - 25

    x = - 5

    4 (-5) - 25 = 9 (-5)

    -20 - 25 = - 45

    -45 = - 45
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