SAT Lines, angles, and triangles Question

Note: Figure not drawn to scale. In the figure, $\overline{LQ}$ intersects $\overline{MP}$ at point R, and $\overline{LM}$ is parallel to $\overline{PQ}$ . The lengths of $\overline{MR}$ , $\overline{LR}$ , and $\overline{RP}$ are 9, 10, and 19, respectively. What is the length of $\overline{LQ}$ ?