Question
Penelope spent $17 on shortbreads which costs $1.70 each. For every 3 shortbreads bought, she received one free shortbread. How many shortbreads did she buy altogether?
3 m

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Penelope spent $17 on shortbreads which costs $1.70 each. For every 3 shortbreads bought, she received one free shortbread. How many shortbreads did she buy altogether?