Question
Rael had 25% as many pens as Ivan. After Rael and Ivan bought another 10 pens and 4 pens respectively, Rael had 50% less pens than Ivan. How many pens did Ivan have at first?
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Rael had 25% as many pens as Ivan. After Rael and Ivan bought another 10 pens and 4 pens respectively, Rael had 50% less pens than Ivan. How many pens did Ivan have at first?