($\frac{1}{2}$. $x^{}$ - $\frac{2}{3}$) - 1 = $\frac{1}{6}$
($\frac{1}{2}$. $x^{}$ - $\frac{2}{3}$) = $\frac{1}{6}$ + 1
($\frac{1}{2}$. $x^{}$ - $\frac{2}{3}$) = $\frac{1}{6}$ + $\frac{6}{6}$
($\frac{1}{2}$. $x^{}$ - $\frac{2}{3}$) = $\frac{7}{6}$
($\frac{1}{2}$. $x^{}$) = $\frac{7}{6}$ + $\frac{2}{3}$
($\frac{1}{2}$. $x^{}$) = $\frac{7}{6}$ + $\frac{4}{6}$
$\frac{1}{2}$. $x^{}$ = $\frac{11}{6}$
$x^{}$ = $\frac{11}{6}$ : $\frac{1}{2}$
$x^{}$ = $\frac{11}{6}$ . $\frac{2}{1}$
$x^{}$ = $\frac{11}{3}$ (Rút gọn 6 với 2 [6:2 = 3])
($x^{}$ - $\frac{3}{5}$). $\frac{1}{2}$ - 1,5 = 0
($x^{}$ - $\frac{3}{5}$). $\frac{1}{2}$ = 0 + 1,5
($x^{}$ - $\frac{3}{5}$). $\frac{1}{2}$ = 1,5
($x^{}$ - $\frac{3}{5}$) = 1,5 : $\frac{1}{2}$
($x^{}$ - $\frac{3}{5}$) = $\frac{15}{10}$ : $\frac{1}{2}$
($x^{}$ - $\frac{3}{5}$) = $\frac{15}{10}$ . $\frac{2}{1}$
$x^{}$ - $\frac{3}{5}$ = 3 (Rút gọn 10 và 2 [10:2 = 5 => $\frac{15}{5}$ = 3 [15:5 =3])
$x^{}$ = 3 + $\frac{3}{5}$
$x^{}$ = 3$\frac{3}{5}$