Respuesta :

Kuroi

Answer:

x=22.5

Step-by-step explanation:

BM||DT

Using Intercept theorem/Intercept theorem

[tex]\frac{6}{6+15} =\frac{9}{9+x}[/tex]

6(9+x)=9*21

54+6x=189

6x=135

x=22.5

At least I think so