Ответ:

[tex] \frac{64}{5} [/tex]

Або -12,8

Пошаговое объяснение:

[tex](5 \times \frac{5}{9} - 6.8) \div (2 \times \frac{13}{30} - 2 \times \frac{1}{12} ) \times 3.6 = \\ = (5 \times \frac{5}{9} - 6 \times \frac{8}{10} ) \div (2 \times \frac{13}{30} - 2 \times \frac{1}{12} ) \times 3 \times \frac{6}{10} = \\ = ( \frac{50}{9} - \frac{68}{10} ) \div ( \frac{73}{30} - \frac{25}{12} \times \frac{36}{10} = \\ = ( \frac{50 \times 10 - 68 \times 9}{9 \times 10} ) \div ( \frac{73 \times 12 - 25 \times 30}{30 \times 12} ) \times \frac{36}{10} = \\ = ( \frac{500 - 612}{90} ) \div ( \frac{876 - 750}{360} ) \times \frac{36}{10} = \\ = - \frac{112}{90} \div \frac{126}{360} \times \frac{36}{10} = - \frac{112}{90} \times \frac{360}{126} \times \frac{36}{10} = \\ = - \frac{112 \times 360 \times 36}{90 \times 126 \times 10} = - \frac{1451520}{113400} = - \frac{64}{5} = - 12.8[/tex]

Вiдповiдь:

[tex] - \frac{64}{5} = - 12.8[/tex]