Sebastian,HowGan

sorry its 13 more, not 18

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3 months ago 3

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  1. Wayne DeguMan
    Best Answer
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    x + y + z = 223...(1)

    x + 13 = z

    x + z = 2y + 7...(2)

    Replacing z with x + 18 into (1) and (2) gives:

    x + y + (x + 13) = 223

    i.e. 2x + y = 210...(1)

    and x + (x + 13) = 2y + 7

    i.e. 2x - 2y = -6...(2)

    (1) - (2) => 3y = 216

    so, y = 72

    Hence, 2x + 72 = 210

    => 2x = 138

    i.e. x = 69

    Therefore, z = 69 + 13 => 82

    so, (x, y, z) --> (69, 72, 82)

    :)>

  2. Morningfox

    Is the largest number 18 more than the smallest, or is it 13 more than the smallest? Your words say 18, but your equations have 13.

  3. Nathan

    feafeaaf

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