4. There is a pile of balls in red and white, with several of each. It is known that the number of white balls is less than the number of red balls, but twice the number of white balls is more than the number of red balls. If each white ball is marked as “2”, and each red ball is marked as “3”, then the total is 60. Therefore, the number of white balls is $\qquad$, and the number of red balls is $\qquad$.
4. 9,14 . (3 points each)

Let the number of white balls be $x$, and the number of red balls be $y$. Then $\left\{\begin{array}{l}x<y<2 x, \\ 2 x+3 y=60\end{array} \Rightarrow\right.$ 7. $5<x<12$. Also, $2 x=60-3 y=3(20-y)$, so $x$ is a multiple of 3.