a) \[ \frac{x}{3} + \frac{2x}{6} = 5 + 2x \]
b) \[ \frac{3x}{4} - \frac{x}{2} = x + 1 \]
c) \[ \frac{2x}{5} + 3 = \frac{4x}{10} + 6 \]
d) \[ \frac{5x}{6} + 2 = \frac{x}{3} + 4 \]
e) \[ \frac{3x}{8} - \frac{x}{4} = \frac{5}{2} - x \]
f) \[ \frac{x}{2} + 1 = \frac{x}{4} + 2 \]
