Question
PSLE
Charlie had 15 more five-dollar notes than fifty-dollar notes at first. He exchanged $450 worth of fifty-dollar notes for five-dollar notes. How many less fifty-dollar notes than five-dollar notes did Charlie have after the exchange?
2 m

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PSLE
Charlie had 15 more five-dollar notes than fifty-dollar notes at first. He exchanged $450 worth of fifty-dollar notes for five-dollar notes. How many less fifty-dollar notes than five-dollar notes did Charlie have after the exchange?