Question
Rachel, Natalie and Dana have 132 pens. Rachel has 56 as many pens as Natalie. Dana's pens is 13 of the total number of Rachel's and Natalie's pens. How many pens must Natalie give to Dana so that both Rachel and Dana will have the same number of pens?
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Rachel, Natalie and Dana have 132 pens. Rachel has 56 as many pens as Natalie. Dana's pens is 13 of the total number of Rachel's and Natalie's pens. How many pens must Natalie give to Dana so that both Rachel and Dana will have the same number of pens?