Tìm x: a) \( x - \frac{1}{5} = -2 \); c) \( \frac{7}{15} x = \frac{29}{9} \cdot \frac{58}{3} \)

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Bài tập 4. Tìm x
a) \( x - \frac{1}{5} = -2 \) ;
c) \( \frac{7}{15} x = \frac{29}{9} \cdot \frac{58}{3} \) ;
e) \( x - \frac{3}{10} = \frac{7}{15} \cdot \frac{3}{5} \) ;
g) \( 2x - \frac{3}{5} = \frac{4}{7} \cdot \frac{14}{6} \) ;
i) \( \frac{1}{4} : \left( x - \frac{2}{3} \right) = 0,75 \) ;

Dạng 2. Bài toán tìm x
b) \( x + \frac{5}{3} = \frac{1}{81} \) ;
d) \( \frac{1}{5} : x = \frac{1}{5} + \frac{1}{7} \) ;
f) \( x + \frac{3}{22} = \frac{27}{121} + \frac{11}{9} \) ;
h) \( \frac{10}{21} - 3x = \frac{3}{8} - \frac{4}{15} \) ;
k) \( -\frac{3}{4} \left( x - \frac{1}{2} \right) = -\frac{1}{3} \) ;