$$\left. \begin{array} { l } { \frac { 4 } { 5 } = \frac { x } { 12 } } \\ { y : 35 = 5 : 7 y } \end{array} \right.$$
$x = \frac{48}{5} = 9\frac{3}{5} = 9.6$
$y=0$
