Question
PSLE
David had 15 more two-dollar notes than fifty-dollar notes at first. He exchanged $800 worth of fifty-dollar notes for two-dollar notes. How many more two-dollar notes than fifty-dollar notes did David have after the exchange?
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PSLE
David had 15 more two-dollar notes than fifty-dollar notes at first. He exchanged $800 worth of fifty-dollar notes for two-dollar notes. How many more two-dollar notes than fifty-dollar notes did David have after the exchange?