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in Sean's fish tank there are six times as many goldfish as Guppies. There are a total of 21 fish in the tank. How many more goldfish are there than Guppies

User Kurotsuki
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15 more. There are 3 guppies and 18 goldfish. Because 3+18=21 and 3x6=18
User Toni Toni Chopper
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