Question
Shiyun had 10 less pies than Barbara at first. After Shiyun had eaten 3 pies, Barbara had twice as many pies as Shiyun in the end. How many pies did Barbara have?
4 m

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Shiyun had 10 less pies than Barbara at first. After Shiyun had eaten 3 pies, Barbara had twice as many pies as Shiyun in the end. How many pies did Barbara have?