Respuesta :

calculista

Answer:

[tex]x=5[/tex]  

Step-by-step explanation:

we have

[tex]\frac{6}{x}=\frac{21}{17.5}[/tex]

Multiply in cross

[tex]21x=6(17.5)[/tex]

Divide  by 21 both sides

[tex]x=6(17.5)/21[/tex]

[tex]x=5[/tex]