Question
Neave bought the same number of pens and staplers. The total cost of 4 pens and 1 stapler was $28. The total cost of 1 pen and 4 staplers was $22. He spent a total of $100. How many pens did Neave buy?
4 m

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Neave bought the same number of pens and staplers. The total cost of 4 pens and 1 stapler was $28. The total cost of 1 pen and 4 staplers was $22. He spent a total of $100. How many pens did Neave buy?