|1-$\frac{2}{3}$x| + $\frac{3}{4}$ - 5$\frac{1}{2}$ =0
|1-$\frac{2}{3}$x| + $\frac{3}{4}$ - $\frac{11}{2}$ =0
|1-$\frac{2}{3}$x| + $\frac{3}{4}$ =0+$\frac{11}{2}$
|1-$\frac{2}{3}$x| + $\frac{3}{4}$ =$\frac{11}{2}$
|1-$\frac{2}{3}$x| =$\frac{11}{2}$ - $\frac{3}{4}$
|1-$\frac{2}{3}$x| =$\frac{22}{4}$ - $\frac{3}{4}$
|1-$\frac{2}{3}$x| =$\frac{19}{4}$
-$\frac{4}{4}$ $\frac{2}{3}$x = $\frac{15}{4}$ hoặc 1-$\frac{2}{3}$x = $\frac{-19}{4}$
⇒ -$\frac{2}{3}$x = $\frac{19}{4}$ - 1 -$\frac{2}{3}$x=$\frac{-19}{4}$-1
-$\frac{2}{3}$x = $\frac{16}{4}$ -$\frac{4}{4}$ -$\frac{2}{3}$x= $\frac{-16}{4}$ -$\frac{4}{4}$
-$\frac{2}{3}$ x =$\frac{7}{2}$ -$\frac{2}{3}$x= $\frac{-7}{2}$
x =$\frac{7}{2}$ : (-$\frac{2}{3}$) x=$\frac{-7}{2}$:$\frac{-2}{3}$
x =$\frac{7}{2}$ . (-$\frac{3}{2}$) x=$\frac{-7}{2}$.$\frac{-3}{2}$
x =-$\frac{21}{4}$ x =-$\frac{21}{4}$
