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Mathematics, 22.05.2021 06:10 graymonky12

80 items were sold, bringing in $6,900 in receipts. Some items were sold at a discount for $75 each and some others were sold at full price for $90 each. How many were sold at discount and how many at full price?

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80 items were sold, bringing in $6,900 in receipts. Some items were sold at a discount for $75 each...
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