document.write( "Question 894804: The manager of an appliance store purchased a number of identical lamps for $8000.After selling all but 4 of the lamps at an average profit of $100 each, the investment of $8000 had been regained. How many lamps did the manager purchase? \n" ); document.write( "

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\n" ); document.write( "The manager of an appliance store purchased a number of identical lamps for $8000.After selling all but 4 of the lamps at an average profit of $100 each, the investment of $8000 had been regained. How many lamps did the manager purchase?
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document.write( "Number of lamps purchased: 
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