a) \(\frac{2}{3}x+\frac{1}{4}=0\)
\(\Leftrightarrow\frac{2}{3}x=-\frac{1}{4}\)
\(\Leftrightarrow x=\frac{-3}{8}\)
Vậy pt có nghiệm x=-3/8
b) \(4x-\frac{5}{6}=0\)
\(\Leftrightarrow4x=\frac{6}{5}\)
\(\Leftrightarrow x=\frac{3}{10}\)
vậy ...
c) \(4x+\frac{1}{2}=0\Leftrightarrow4x=-\frac{1}{2}\Leftrightarrow x=\frac{-1}{8}\)
vậy...
d) \(\frac{5}{9}-x=0\Leftrightarrow x=\frac{5}{9}\)
vậy...
e) \(\frac{4}{3}x+\frac{1}{4}=\frac{2}{3}x-\frac{5}{4}\)
\(\Leftrightarrow\frac{4}{3}x-\frac{2}{3}x=-\frac{5}{4}-\frac{1}{4}\)
<=> x=...
vậy ...
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