$x$ + $\frac{2}{3}$ = $\frac{9}{11}$ $x$ - $\frac{5}{10}$= $\frac{4}{15}$
$x$ = $\frac{9}{11}$ - $\frac{2}{3}$ $x$ = $\frac{4}{15}$ + $\frac{5}{10}$
$x$ = $\frac{5}{33}$ $x$ = $\frac{23}{30}$
$x$ x $\frac{1}{7}$= $\frac{5}{6}$ $x$ : $\frac{3}{5}$ = $\frac{1}{6}$
$x$ = $\frac{5}{6}$ : $\frac{1}{7}$ $x$ = $\frac{1}{6}$ x $\frac{3}{5}$
$x$ = $\frac{35}{6}$ $x$ = $\frac{3}{30}$=$\frac{1}{10}$