=>7/5x+2/3=4/3x-1/4 hoặc 7/5x+2/3=1/4-4/3x
=>1/15x=-1/4-2/3=-3/12-8/12=-11/12 hoặc 41/15x=1/4-2/3=-5/12
=>x=-55/4 hoặc x=-25/164
\(\left|\dfrac{7}{5}x+\dfrac{2}{3}\right|=\left|\dfrac{4}{3}x-\dfrac{1}{4}\right|\)
\(=>\left[{}\begin{matrix}\dfrac{7}{5}x+\dfrac{2}{3}=\dfrac{4}{3}x-\dfrac{1}{4}\\\dfrac{7}{5}x+\dfrac{2}{3}=\dfrac{1}{4}-\dfrac{4}{3}x\end{matrix}\right.\)
\(=>\left[{}\begin{matrix}\dfrac{7}{5}x-\dfrac{4}{3}x=-\dfrac{1}{4}-\dfrac{2}{3}\\\dfrac{7}{5}x+\dfrac{4}{3}x=\dfrac{1}{4}-\dfrac{2}{3}\end{matrix}\right.\)
\(=>\left[{}\begin{matrix}\dfrac{1}{15}x=-\dfrac{11}{12}\\\dfrac{41}{15}x=-\dfrac{5}{12}\end{matrix}\right.\)
\(=>\left[{}\begin{matrix}x=-\dfrac{11}{12}:\dfrac{1}{15}\\x=-\dfrac{5}{12}:\dfrac{41}{15}\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=-\dfrac{55}{4}\\x=-\dfrac{25}{164}\end{matrix}\right.\)
