Question
Kylie has five times as many cards as Penelope. After Penelope has bought another 90 cards, Penelope has twice as many cards as Kylie. How many cards does Penelope have at first?
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Kylie has five times as many cards as Penelope. After Penelope has bought another 90 cards, Penelope has twice as many cards as Kylie. How many cards does Penelope have at first?