Answer:
x = 11
Explanation:
The angle RST contains both angle QST and QSR
We were also given the angle of RST which was 65
With this information we can assume that the angle measure of QST + QSR will equal the angle measure of 65
SO, we can set this expression up:
65 = QST + QSR
65 = 2x + (3x - 10)
Now to solve for x
65 = 2x + 3x - 10
65 = 5x - 10
+10 +10
55 = 5x
/5 /5
11 = x