Question
Risa had $19.80 in coins. She had thrice as many 10-cent as 50-cent coins and 9 more $1 coins than 50-cent coins. How many coins does she have in total?
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Risa had $19.80 in coins. She had thrice as many 10-cent as 50-cent coins and 9 more $1 coins than 50-cent coins. How many coins does she have in total?