-а=(2 12/35:4/5-1 8/35):0,3. Срочно пожалуйста

[tex] - a = (2 \times \frac{12}{35} \ \times \frac{4}{5} - 1 \times \frac{8}{35} ) \div 0.3 \\ - a = (2 \times \frac{12}{35} \ \times \frac{5}{4} - \frac{8}{35} ) \div \frac{3}{10} \\ - a = (2 \times \frac{3}{7} - \frac{8}{35} ) \times \frac{10}{3} \\ - a = ( \frac{6}{7} - \frac{8}{35} ) \times \frac{10}{3} \\ - a = \frac{22}{35} \times \frac{10}{3} \\ - a = \frac{22}{7} \times \frac{2}{3} \\ - a = \frac{44}{21} \\ a = - \frac{44}{21} [/tex]