۲) $\frac{1}{3}x + 2 = \frac{4}{5}$ $\frac{1}{3}x = \frac{4}{5} - 2$ $\frac{1}{3}x = \frac{4-10}{5}$ $\frac{1}{3}x = \frac{-6}{5}$ $x = \frac{-6/5}{1/3} = -\frac{18}{5}$

۳) $\sqrt{2}x + \frac{2}{3} = 5$ $\sqrt{2}x = 5 - \frac{2}{3}$ $\sqrt{2}x = \frac{15-2}{3} = \frac{13}{3}$ $x = \frac{13/3}{\sqrt{2}} = \frac{13}{3\sqrt{2}}$