[tex](-3,6:\frac{5}{9})+1,4=(-\frac{36}{10}\cdot\frac{9}{5})+1,4=\\\\=(-\frac{18}{5}\cdot\frac{9}{5})+1,4=(-\frac{162}{25})+1,4=\\\\=-6\frac{12}{25}+1,4=-6\frac{48}{100}+1,4=\\\\=-6,48+1,4=\boxed{-5,08}[/tex]
