$|\frac{3}{4}.x-\frac{3}{4}| -\frac{3}{4}=|\frac{-3}{4}|$
=>$|\frac{3}{4}.x-\frac{3}{4}| -\frac{3}{4}=\frac{3}{4}$
=>$|\frac{3}{4}.x-\frac{3}{4}|=\frac{3}{4}+\frac{3}{4}$
=>$|\frac{3}{4}.x-\frac{3}{4}|=\frac{6}{4}$
=>\(\left[ \begin{array}{l}\frac{3}{4}.x-\frac{3}{4}=\frac{6}{4}\\\frac{3}{4}.x-\frac{3}{4}=-\frac{6}{4}\end{array} \right.\)
=>\(\left[ \begin{array}{l}\frac{3}{4}.x=\frac{6}{4}+\frac{3}{4}\\\frac{3}{4}.x-\frac{3}{4}=-\frac{6}{4}+\frac{3}{4}\end{array} \right.\)
=>\(\left[ \begin{array}{l}\frac{3}{4}.x=\frac{9}{4}\\\frac{3}{4}.x=\frac{-3}{4}\end{array} \right.\)
=>\(\left[ \begin{array}{l}x=3\\x=-1\end{array} \right.\)
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