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suppose you own a card shop. you buy one line o cards at a rate of 4 cards for $5. You plan to sell the cards at a rate of 3 cards for $5. How many cards must you sell in order to make a profit of $100?

  • math -

    Profit = Sale - Cost
    100 = (5/3)o - (5/4)o

    Simplify and solve for o

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