a. $x + \frac{3}{8}=\frac{4}{3}$
$x = \frac{4}{3} - \frac{3}{8}$
$x = \frac{32}{24}-\frac{9}{24}$
$x = \frac{23}{24}$
b. $x - \frac{4}{5}=\frac{7}{6}$
$x = \frac{7}{6}+\frac{4}{5}$
$x = \frac{35}{30}+\frac{24}{30}$
$x = \frac{54}{30}$
c. $x \times \frac{1}{9}=\frac{21}{8}$
$x = \frac{21}{8}: \frac{1}{9}$
$x = \frac{21}{8}\times \frac{9}{1}$
$x = \frac{189}{8}$
d. $x : \frac{8}{5}=5$
$x = 5 \times \frac{8}{5}$
$x = \frac{40}{5}$
$x = 8$