Question
Risa, Jaslyn, Valen and Gwen shared some pens. Risa and Jaslyn took 15 of the total number of pens while Valen and Gwen took the rest. Jaslyn had twice as many pens as Risa and Gwen had 40 pens. Given that Gwen had twice as many pens as Jaslyn, how many pens were there altogether?
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Risa, Jaslyn, Valen and Gwen shared some pens. Risa and Jaslyn took 15 of the total number of pens while Valen and Gwen took the rest. Jaslyn had twice as many pens as Risa and Gwen had 40 pens. Given that Gwen had twice as many pens as Jaslyn, how many pens were there altogether?