Đáp án:
x - $\frac{5}{12}$ = $\frac{2}{-6}$
<=> x = $\frac{2}{-6}$ + $\frac{5}{12}$
<=> x = $\frac{-4}{12}$ + $\frac{5}{12}$
<=> x = $\frac{1}{12}$
x - $\frac{21}{3}$ = $\frac{5}{6}$
<=> x = $\frac{5}{6}$ + $\frac{21}{3}$
<=> x = $\frac{5}{6}$ + $\frac{42}{6}$
<=> x = $\frac{47}{6}$
$\frac{x}{18}$=$\frac{1}{9}$ + $\frac{-3}{18}$
<=> $\frac{x}{18}$=$\frac{-1}{18}$
<=> x = -1
x+ $\frac{3}{6}$= $\frac{1}{2}$+ $\frac{2}{-3}$
<=> x+ $\frac{3}{6}$= $\frac{1}{6}$
<=> x = $\frac{1}{6}$ - $\frac{3}{6}$
<=> x = $\frac{-2}{6}$
