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Ancient math problem: "Eighty-three thousand short bamboo poles, you should put the pen away in the future and manage three sets of five." How many of us can finish it? "
Solution:

Suppose that the number of short bamboos used to make the pen holder is x, and the number of short bamboos used to make the pen holder is y,

Then: x+y=83000①

3x=5y②

Both forms are expressed at the same time, x=5 1875.

y=3 1 125

Answer: The number of short bamboos used to make pens is 5 1875, and the number of short bamboos used to make pen covers is 3 1 125.

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