Mathematics, 08.07.2021 14:00, plug30
The total cost of 2 identical files and 1 pen is $19.05. The total cost of 3 such files and 5 such pens is $44.50. Find the cost of 1 pen.
Answers: 3
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The total cost of 2 identical files and 1 pen is $19.05. The total cost of 3 such files and 5 such p...
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