Answer:
x = 30
Explanation:
Side splitter theorem,
"If a line intersects two sides of a triangle and is parallel to the third side of the triangle, will divide the sides proportionally."
Therefore, ratio of the parts of two sides intersected will be proportional.
![(3)/(15)= (6)/(x)](https://img.qammunity.org/2022/formulas/mathematics/high-school/adkas478htbh7zejm2wuc68vbd7pae7kus.png)
![x=(6* 15)/(3)](https://img.qammunity.org/2022/formulas/mathematics/high-school/h224mz4ixb8vc7tb6h1gm65c62ciomhmm7.png)
![x=30](https://img.qammunity.org/2022/formulas/mathematics/college/3dw0w0eptuted5s6jy4n5xab3cc5z9aawo.png)
Therefore,
will be the answer.