Question
Irene bought some balloons for her birthday party. A helium balloon cost $9 and a normal balloon cost $3. She paid a total of $51. If she bought 3 helium balloons, how many normal balloons did she buy?
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Irene bought some balloons for her birthday party. A helium balloon cost $9 and a normal balloon cost $3. She paid a total of $51. If she bought 3 helium balloons, how many normal balloons did she buy?