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13 April, 21:21

The length of a rectangle is 5 inches less than three times its width. The perimeter is 86 inches. Find the dimensions, in inches, of the rectangle.

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  1. 13 April, 21:49
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    8x - 10 = 86 {combined like terms}

    8x = 96 {added 10 to both sides}

    x = 12 {divided both sides by 8}

    3x - 5 = 31 {substituted 12, in for x, into 3x - 5}

    width = 12 in.

    length = 31 in.
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