26. $$\frac{x}{5} - \frac{x}{10} + x = \frac{22}{5}$$

$$\begin{aligned} \frac{x}{5} - \frac{x}{10} + x &= \frac{22}{5} \\ \frac{2x}{10} - \frac{x}{10} + \frac{10x}{10} &= \frac{22}{5} \\ \frac{11x}{10} &= \frac{22}{5} \\ 11x &= \frac{22}{5} \cdot 10 \\ 11x &= 44 \\ x &= \frac{44}{11} \\ x &= 4 \end{aligned}$$ Ответ: x = 4