10. (6 points) In a cage with chickens and rabbits, there are a total of 250 feet, and the number of rabbits is 53 less than the number of chickens. How many rabbits are there? $\qquad$
【Solution】Solution: Let there be $x$ rabbits, then there are $(x+53)$ chickens,
$$
\begin{aligned}
4 x+(x+53) \times 2 & =250, \\
4 x+2 x+106 & =250, \\
6 x & =144, \\
x & =24 ;
\end{aligned}
$$

Answer: There are 24 rabbits.
So the answer is: 24 .