[m]=\frac{18}{5} \cdot \frac{5}{3} - 12 : (-\frac{5}{8}) = \frac{18}{3} + 12 \cdot \frac{8}{5} = 6 + \frac{96}{5} = 6+19+\frac{1}{5} = 25,2[/m]
[m]\frac{x}{4} + \frac{1}{12} = \frac{3x+1}{2} - \frac{2}{9}[/m]
[m]\frac{9x}{36} + \frac{3}{36} = \frac{18(3x+1)}{36} - \frac{8}{36}[/m]
9x + 3 = 18(3x + 1) - 8
9x + 3 = 54x + 18 - 8
-45x = 7
x = -7/45