SAT Lines, angles, and triangles Question

In triangle $RST$ , the measure of angle $R$ is $39^{\circ }$ , the measure of angle $S$ is $x^{\circ }$ , and the measure of angle $T$ is $(5x-3{)}^{\circ }$ . Point $L$ lies on $\overline{RS}$ , point $K$ lies on $\overline{ST}$ , and $\overline{LK}$ is parallel to $\overline{RT}$ . What is the measure, in degrees, of angle $SKL$ ? (Disregard the degree symbol when entering your answer.)