Question
PSLE
Tim had 18 more five-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for five-dollar notes. How many more five-dollar notes than ten-dollar notes did Tim have after the exchange?
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PSLE
Tim had 18 more five-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for five-dollar notes. How many more five-dollar notes than ten-dollar notes did Tim have after the exchange?