[tex] \frac{7}{3} - 2.(3) = \\ \\ = \frac{7}{3} - 2 \frac{3}{9} = \\ \\ = \frac{7}{3} - \frac{2 \times 9 + 3}{9} = \\ \\ = \frac{7}{3} - \frac{21}{9} = \\ \\ = \frac{7 \times 3}{3 \times 3} - \frac{21}{9} = \\ \\ = \frac{21}{9} - \frac{21}{9} = 0[/tex]
