Question
PSLE
John had 17 more one-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for one-dollar notes. How many less ten-dollar notes than one-dollar notes did John have after the exchange?
2 m

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PSLE
John had 17 more one-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for one-dollar notes. How many less ten-dollar notes than one-dollar notes did John have after the exchange?