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A developer decides to build a fence around a neighborhood park, which is positioned on a rectangular lot. Rather than fencing along the lot line, he fences x feet from each of the lot's boundaries. By fencing a rectangular space smaller than the lot, the developer saves $432 in fencing materials, which cost $12 per linear foot. How much does he spend?

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A developer decides to build a fence around a neighborhood park, which is positioned on a rectangular lot. Rather than fencing along the lot line, he fences <i>x</i> feet from each of the lot's boundaries. By fencing a rectangular space <br><img src='https://www.fatskills.com/images3/praxismultiple/image_003_033.png'/> smaller than the lot, the developer saves $432 in fencing materials, which cost $12 per linear foot. How much does he spend?






 
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