\(\frac{2}{3}x - \frac{1}{2} = \left(\frac{-2}{3}\right)^{2}\). \(\frac{1}{3}x + \frac{2}{5}(x - 1) = 0\). \(\frac{3}{7} + \frac{1}{7} \cdot x = \frac{3}{14}\)

----- Nội dung ảnh -----
```
d) \(\frac{2}{3}x - \frac{1}{2} = \left(\frac{-2}{3}\right)^{2}\)

e) \(\frac{1}{3}x + \frac{2}{5}(x - 1) = 0\)

f) \(\frac{3}{7} + \frac{1}{7} \cdot x = \frac{3}{14}\)
```