The number of people who reported 3 is x, and those who reported 1 are thinking: 2 * 2-x = 4-x.

The people who reported 9 thought:10 * 2-(4-x) =16+x.

The people who reported 7 thought: 8 * 2-(16+x) =-X.

The people who reported 5 thought: 6 * 2-(-x) =12+x.

Clockwise: people who report 5 think: 4 * 2-x = 8-X.

The people who reported 7 thought: 6 * 2-(8-x) = 4+x.

Then: According to newspaper 5, this person can list the equation 12+X=8-X X=-2.

According to newspaper 7, people can make the equation -x = 4+x =-2.

So the person who reported 3 is thinking -2.