In the given triangle the lines are parallel.We can apply Triangle proportionality theorem.
The theorem states: If a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally.
We can form a proportion using this theorem :
![(5)/(3) =(6)/(x)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ev9z8o3iiw4n000j8jkibrt6sygcayzt6q.png)
To solve x we cross multiply:
5x=18
Dividing both sides by 5 we get
x=3.6
Second option.