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math word problem

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word problem need help:
suppose you own a card shop. you buy one line of cards at a rate of 4 cards for $5.
you plan to sell the cards at a rate of
3 cards for $5
how may carfds must you sell in order to make a profit of $100.00
i don't understand how to get answer can you help

  • math word problem -

    5/4 = 1.25 >> amount paid for each card

    5/3 = 1.67 >> amount received for each card

    1.67 - 1.25 = 0.42 profit on each card.

    100 / 0.42 = 238.1 = 239 cards to make a profit of at least $100.

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