Respuesta :

Answer:

1 / 5

Step-by-step explanation:

5 / 7 of x is 1 / 7

( 5 / 7 ) * x = 1 / 7

x = ( 1 / 7 ) * ( 7 / 5 )

= ( 1 * 7 ) / ( 7 * 5 )

x = 1 / 5