Question
Paul bought the same number of markers and notebooks. The total cost of 4 markers and 1 notebook was $18. The total cost of 1 marker and 4 notebooks was $12. He spent a total of $54. How many markers did Paul buy?
4 m

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Paul bought the same number of markers and notebooks. The total cost of 4 markers and 1 notebook was $18. The total cost of 1 marker and 4 notebooks was $12. He spent a total of $54. How many markers did Paul buy?