Answer:
X=16
Step-by-step explanation:
Line QT is congruent with line RS, while line RQ is also congruent with line TS. All in all, each line is congruent to the other. Meaning all sides equal the same amount. We know that angle measure must equal 180, so you must take 3x+5+9x-17=180. Then you will get the variable X to equal 16.
