Respuesta :
Answer: 3 units
Step-by-step explanation:
By the triangle proportionality theorem,
[tex]\frac{12}{4}=\frac{9}{x} \\ \\ 3=\frac{9}{x} \\ \\ x=\boxed{3}[/tex]


Answer: 3 units
Step-by-step explanation:
By the triangle proportionality theorem,
[tex]\frac{12}{4}=\frac{9}{x} \\ \\ 3=\frac{9}{x} \\ \\ x=\boxed{3}[/tex]