According to the given information, the triangles are similar, which means that the following proportion can be stated:
[tex]\frac{MS}{MA}=\frac{LD}{LE}[/tex]
Replace for each value:
[tex]\frac{25}{15}=\frac{x}{3}[/tex]
Solve the proportion for x:
[tex]\begin{gathered} 3\cdot\frac{25}{15}=x \\ x=\frac{25}{5} \\ x=5 \end{gathered}[/tex]
x has a value of 5. According to this, the correct answer is A. 5.
