a) (x-$\frac{5}{3}$ ) : (-1$\frac{3}{4}$ )= 0
(x-$\frac{5}{3}$ ) : -$\frac{7}{4}$ = 0
(x-$\frac{5}{3}$ )= 0
x= $\frac{5}{3}$
d) ($\frac{5}{6}$ - $\frac{3}{4}$) : $\frac{-2x}{3}$= -$\frac{12}{19}$
$\frac{5x}{48}$ = -$\frac{12}{19}$ $⇒$ 5x.19= -48.12
$\frac{-5x.19}{95}$ = $\frac{-48.12}{95}$
x= $\frac{-48.12}{95}$= -$\frac{576}{95}$
Chúc học tốt!!!