$(\frac{5}{8}:\frac{30}{4}*\frac{2}{11})/x=(\frac{1}{3}-\frac{1}{11})/(5^2-3^2)$
$(\frac{5}{8}*\frac{4}{30}*\frac{2}{11})/x=(\frac{11-3}{33})/(25-9)$
$\frac{1}{66}/x=\frac{8}{33}/16$
$x=\frac{\frac{1}{66}*16}{\frac{8}{33}}=\frac{\frac{8}{33}}{\frac{8}{33}}=1$