Question
Ian bought the same number of files and notebooks. The total cost of 3 files and 1 notebook was $17. The total cost of 1 file and 3 notebooks was $11. He spent a total of $28. How many files did Ian buy?
4 m

Click button first when a symbol is required. X

Ian bought the same number of files and notebooks. The total cost of 3 files and 1 notebook was $17. The total cost of 1 file and 3 notebooks was $11. He spent a total of $28. How many files did Ian buy?