In the figure, lines $p$ and $q$ are parallel, and line $t$ is a transversal. The two consecutive interior angles formed by the intersection of line $t$ with lines $p$ and $q$ are $(2 x + 10)^{\circ}$ and $(3 x - 20)^{\circ}$ . What is the value of $x$ ?

(Note: The figure shows two parallel lines $p$ and $q$ intersected by a transversal $t$ . Two angles are shown between lines $p$ and $q$ and on the same side of transversal $t$ . One angle is labeled $(2 x + 10)^{\circ}$ and the other is labeled $(3 x - 20)^{\circ}$ .)