Question
Risa had five times as many pens as Esther. After Esther bought another 72 pens, Esther had 2 times as many pens as Risa. How many pens did Risa have?
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Risa had five times as many pens as Esther. After Esther bought another 72 pens, Esther had 2 times as many pens as Risa. How many pens did Risa have?