помогите
[tex] \frac{1}{2} \times ( \frac{1}{3} x + \frac{2}{3} ) - \frac{1}{4} \times ( \frac{1}{2} x - \frac{1}{5} ) = \frac{2}{3} [/tex]

1/2 * (x/3 + 2/3) - 1/4 * (x/2 - 1/5) = 2/3

(x + 2)/6 - (5x - 2)/40 = 2/3

20(x + 2) - 3(5x - 2) = 80

40x + 40 - 15x + 6 = 80

25x = 34

x = 1 9/25