The answer is very simple.
We can use the triangle proportionality theorem to solve this exercise.
The ratios are:
[tex]\frac{WV}{TW}\text{ = }\frac{XV}{UV}[/tex]
Those are the relations between the sides .
[tex]\frac{2}{7}\text{ = }\frac{XV}{12}[/tex][tex]\frac{2}{7}\cdot12=XV[/tex][tex]XV=\frac{24}{7}=3.428[/tex]
The solution is :
XV = 3.43
