Question
Pierre bought the same number of markers and pens. The total cost of 3 markers and 1 pen was $18. The total cost of 1 marker and 3 pens was $14. He spent a total of $80. How many markers did Pierre buy?
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Pierre bought the same number of markers and pens. The total cost of 3 markers and 1 pen was $18. The total cost of 1 marker and 3 pens was $14. He spent a total of $80. How many markers did Pierre buy?