Tìm x biết:

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Bài 6: Tìm x biết:

a) 7.8 × x = 6.2, 7.8
b) \( \frac{2}{3} - \frac{5}{6} = \frac{3}{2} \)
c) \( \frac{-2}{3} - \frac{1}{5} = \frac{3}{10} \)
d) \( 1 \, \text{(bất kỳ)} \)
e) \( 1 \, \text{(bất kỳ)} \)
f) \( \left( \frac{1}{2} + 2x \right) \cdot \frac{2}{3} = \frac{5}{3} \)
g) \( 1 \, \text{(bất kỳ)} \)
h) \( 1 \, \text{(bất kỳ)} \)
i) \( 1 \, \text{(bất kỳ)} \)
j) \( 1 \, \text{(bất kỳ)} \)
k) \( 1 \, \text{(bất kỳ)} \)
l) \( 1 \, \text{(bất kỳ)} \)
m) \( \frac{1}{4} - \frac{1}{3} (2x - 1) = -5 \)
n) \( (3x - 2) \left( \frac{1}{2}x + 3 \right) = 0 \)