Question
John and Japheth had 75 basketball sets. After John gave 15 basketball sets to Japheth, John had four times as many basketball sets as Japheth. How many basketball sets did John have at first?
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John and Japheth had 75 basketball sets. After John gave 15 basketball sets to Japheth, John had four times as many basketball sets as Japheth. How many basketball sets did John have at first?