One day when Wendy is riding her horse Vanessa, they get to a field where some tourists are following Martin (the tour guide) on some horses.  Martin and some of the workers at the stables are each leading extra horses, so there are more horses than people.  Martin's dog Berry runs around near the trail as well.  Wendy counts a total of $28$ heads belonging to the people, horses, and dog.  She counts a total of $92$ legs belonging to everyone, and notes that nobody is missing any legs.

Upon returning home Wendy gives Alexis a little problem solving practice, "I saw $28$ heads and $92$ legs belonging to people, horses, and dogs.  Assuming two legs per person and four for the other animals, how many people did I see?"  Alexis scribbles out some algebra and answers correctly.  What is her answer?
1. Let \( x \) be the number of people, and \( y \) be the number of four-legged animals (horses and the dog). We are given the following information:
   - The total number of heads is 28.
   - The total number of legs is 92.

2. We can set up the following system of equations based on the given information:
   \[
   x + y = 28 \quad \text{(1)}
   \]
   \[
   2x + 4y = 92 \quad \text{(2)}
   \]

3. To eliminate \( y \), we can manipulate these equations. First, simplify equation (2) by dividing everything by 2:
   \[
   x + 2y = 46 \quad \text{(3)}
   \]

4. Now, subtract equation (1) from equation (3):
   \[
   (x + 2y) - (x + y) = 46 - 28
   \]
   Simplifying this, we get:
   \[
   x + 2y - x - y = 18
   \]
   \[
   y = 18
   \]

5. Substitute \( y = 18 \) back into equation (1):
   \[
   x + 18 = 28
   \]
   Solving for \( x \), we get:
   \[
   x = 28 - 18
   \]
   \[
   x = 10
   \]

6. Therefore, the number of people Wendy saw is \( \boxed{10} \).