Question
Zane had 10% as many pens as Paul. After Zane and Paul bought another 28 pens and 20 pens respectively, Zane had 70% less pens than Paul. How many pens did Paul have at first?
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Zane had 10% as many pens as Paul. After Zane and Paul bought another 28 pens and 20 pens respectively, Zane had 70% less pens than Paul. How many pens did Paul have at first?