Lizzy: Brenda bakes 20 cakes a day. She does this for 9 days and then sells half of the cakes. How many cakes are left with Brenda?.
Me: Hmmm, let me think. I think this is the detailed solution:
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After 9 days, Brenda bakes 20 * 9 = 180 cakes. After she sells half of them, the remaining will be 180 / 2 = 90 cakes. Final answer: 90.
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