Tìm x biết

giúp = 5 sao
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Bài 5: Tìm x biết:

a) \( x: \frac{1}{2} - \frac{2}{5} \)
b) \( x: \frac{3}{4} = \frac{7}{1 2} \)
c) \( x: \frac{-4}{3} = \frac{1}{2} \)
d) \( x: \frac{5}{6} = \frac{3}{3} \)
e) \( -\frac{4}{5} + \frac{5}{2} = -\frac{3}{10} \)
f) \( \frac{4}{3} \cdot \frac{5}{8} = \frac{1}{12} \)
g) \( \frac{7}{4^6} - \frac{5}{2} \)
h) \( \frac{1}{2} \cdot x = -\frac{5}{7} \)
k) \( \frac{4}{3} - \frac{5}{8} = \frac{1}{12} \)
m) \( -\frac{2}{7} + \frac{2}{3} \cdot x = -\frac{1}{5} \)