Intermediate algebra, concepts and graphs

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How would I figure out another rectangle equation? The length of a rectangle is 4 meters less than 3 times the width. The perimeter is 24 meters. Find the width.

  • Intermediate algebra, concepts and graphs -

    P = 2 l + 2w

    L = 3w-4

    24 = 2(3w-4) + 2w

    24 = 6w -8 + 2w

    24 = 8w -8

    24 + 8 = 8w-8 +8

    32 = 8w

    8w/8 = 32/8

    w = 4

  • Intermediate algebra, concepts and graphs -

    This is the answer I came up with and the website for my homework says it is wrong. I thought I was doing this equation wrong. Thank you.

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