Question
Carl had 135 pens more than Valen at first. After Carl had given away 151 of his pens to Will, Valen had thrice as many pens as Carl. Find the number of pens Carl had at first.
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Carl had 135 pens more than Valen at first. After Carl had given away 151 of his pens to Will, Valen had thrice as many pens as Carl. Find the number of pens Carl had at first.