Đáp án:
$\text{0,5x- $\dfrac{2}{3}$x = $\dfrac{7}{12}$ }$
$\text{⇔ $\dfrac{3}{6}$ -$\dfrac{4}{6}$x =$\dfrac{7}{12}$ }$
$\text{⇔ -$\dfrac{1}{6}$x = $\dfrac{7}{12}$ }$
$\text{⇔ x = $\dfrac{7}{12}$ : (-$\dfrac{1}{6}$) }$
$\text{⇔ x = -$\dfrac{7}{2}$ }$
$\text{Vậy x = -$\dfrac{7}{2}$}$