Question

Tìm x biết:

a) \(x-\frac{5}{4}=\frac{1}{3}-\frac{3}{4}x\)

b) \(\frac{1}{2}x+\frac{1}{5}=\frac{2}{3}x-\frac{1}{4}\)

Answer 1

a) \(\Leftrightarrow x+\frac{3}{4}x=\frac{1}{3}+\frac{5}{4}\)

\(\Leftrightarrow\frac{7}{4}x=\frac{19}{12}\Leftrightarrow x=\frac{19}{12}:\frac{7}{4}=\frac{19}{21}\)

b) \(\Leftrightarrow\frac{2}{3}x-\frac{1}{2}x=\frac{1}{4}+\frac{1}{5}\Leftrightarrow\frac{1}{6}x=\frac{9}{20}\Leftrightarrow x=\frac{9}{20}:\frac{1}{6}=\frac{27}{10}\)