Question
Min and Erika have some marbles. If Min gives 18 marbles to Erika, Erika will have 4 times the number of marbles as Min. If Erika gives 18 marbles to Min, Min will have 12 as many marbles as Erika. How many marbles does Min have at first?
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Min and Erika have some marbles. If Min gives 18 marbles to Erika, Erika will have 4 times the number of marbles as Min. If Erika gives 18 marbles to Min, Min will have 12 as many marbles as Erika. How many marbles does Min have at first?