Answer:
Option C.
Explanation:
Given information: RSTU is a parallelogram, Digonals RT and SU intersect each other at point V, UV=(x-3) and VS=(3x-13).
According to the properties of a parallelogram, the diagonals of a parallelogram bisect each other.
Using the properties of parallelogram we can say that point V divides the diagonal SU in two equal parts, UV and VS.
![VS=UV](https://img.qammunity.org/2020/formulas/mathematics/middle-school/bi8f0h3lzot5lnvzk8pjjn9j410gmpej10.png)
![3x-13=x-3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y71wpwg00s9bsdahhy1e5btrl3kdwyhar8.png)
Subtract x from both sides.
![2x-13=-3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/2l9db1jjm2lt5o9a91nxngkahkf2e5s55c.png)
Add 13 on both sides.
![2x=10](https://img.qammunity.org/2020/formulas/mathematics/middle-school/pkex03t0bidrnf3xx6uab5hg47a3sfhgz0.png)
Divide both sides by 2.
![x=5](https://img.qammunity.org/2020/formulas/mathematics/high-school/o5m8b661p5jd65tmflgivq8gybwcjq1o2n.png)
Therefore, the correct option is C.