A shopkeeper had some red and blue pens. The number of red pens was 25% of the total number of pens. After selling away 30 red pens and 30 blue pens, the number of red pens became 25% of the number of blue pens left. How many pens did he have at first?
Wayne had five more 50-cent coins than 20-cent coins. After he used eight 50-cent coins, the value of 50-cent coins is $1.50 more than the value of 20-cent coins. How many coins did he have at first?
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