Explicație pas cu pas:
[tex] \frac{2}{5} \times ( \frac{2}{3} + 1) - (2 - \frac{4}{3} ) = 0 \\ \frac{2}{5} \times ( \frac{2}{3} + \frac{3}{3} ) - ( \frac{6}{3} - \frac{4}{3} ) = 0 \\ \frac{2}{5} \times \frac{5}{3} - \frac{2}{3} = 0 \\ \frac{2}{3} - \frac{2}{3} = 0[/tex]
