Ответ:

[tex] \frac{ \frac{ - 11.2}{( - 2.8) - 3.6 + 2.4)} }{( - 0.4)} [/tex]

[tex] \frac{ \frac{ - 11.2}{ - 2.8 - 3.6 + 2.4} }{ \frac{2}{5} } = \frac{ \frac{ - 11.2}{ - 4} }{ \frac{2}{5} } = \frac{2.8}{ \frac{2}{5} } = \frac{ \frac{14}{5} }{ \frac{2}{5} } = \frac{ 14}{ - 2} = - 7[/tex]