$\frac{5}{4}$ × x = $\frac{3}{8}$ + $\frac{5}{12}$
$\frac{5}{4}$ × x = $\frac{9}{24}$ + $\frac{10}{24}$
$\frac{5}{4}$ × x = $\frac{19}{24}$
x = $\frac{19}{24}$ : $\frac{5}{4}$
x = $\frac{19}{24}$ × $\frac{4}{5}$
x = $\frac{76}{120}$
x = $\frac{19}{30}$
~(Chúc bạn học tốt!)~