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There is a folk math problem: "Pheasants and rabbits walk on the ground of 39 100 feet". Please count how many pheasants there are. How many rabbits?
Suppose all pheasants and rabbits have:

( 100-39×2)÷(4-2)

=22÷2

= 1 1 (only);

The pheasant is: 39- 1 1=28 (only).

Answer: there are 28 pheasants and rabbits 1 1.

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