|x|-\(\frac{3}{4}\)=\(\frac{1}{4}\)
\(\Rightarrow\) |x| =\(\frac{1}{4}\)+\(\frac{3}{4}\)
\(\Rightarrow\) |x| =\(\frac{7}{4}\)
\(\Rightarrow\)x=\(\frac{7}{4}\)hoặc x=\(\frac{-7}{4}\)
Vậy x\(\in\)\(\left\{\frac{-7}{4};\frac{7}{4}\right\}\)
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