Mathematics, 28.11.2021 03:20 kaylienguyen

The cost of a pen is 3 times the cost of a pencil. The total cost of 8 pencils and 5 pens is $11.50. Please help me to find the costs of a pen and a pencil.

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The cost of a pen is 3 times the cost of a pencil. The total cost of 8 pencils and 5 pens is $11.50....

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