Question
Winnie and Emma had an equal number of pens at first. After Winnie gave 11 pens to Emma, Emma had 28 pens. How many pens does Winnie have in the end?
4 m

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Winnie and Emma had an equal number of pens at first. After Winnie gave 11 pens to Emma, Emma had 28 pens. How many pens does Winnie have in the end?