Question
Min had 78 more pens than Kathy at first. Kathy gave 12 of her pens to Min. Min now has 3 times as many pens as Kathy. How many pens did Kathy have at first?
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Min had 78 more pens than Kathy at first. Kathy gave 12 of her pens to Min. Min now has 3 times as many pens as Kathy. How many pens did Kathy have at first?