Đáp án:
$\frac{x}{5}$ = $\frac{3}{4}$ - 2
$\frac{x}{5}$ = $\frac{3}{4}$ - $\frac{8}{4}$
$\frac{x}{5}$ = $\frac{3 - 8}{4}$
$\frac{x}{5}$ = $\frac{-5}{4}$
⇒ x . 4 = 5 . (-5)
x . 4 = -25
x = -25 : 4
x = -25 x $\frac{1}{4}$
x = $\frac{-25}{4}$
Vậy x = $\frac{-25}{4}$