[tex]\displaystyle\bf\\n=\sqrt{3\times5,\!(3)}+\sqrt{0,36}-\frac{1}{2}\times\sqrt{\frac{36}{25}} +\sqrt{2025}:\sqrt{81}\\\\\\n=\sqrt{3\times \frac{53-5}{9}}+0,6-\frac{1}{2}\times\frac{6}{5} +45:9\\\\\\n=\sqrt{3\times \frac{48}{9}}+\frac{6}{10}-\frac{1}{\not2}\times\frac{\not6}{5} +45:9\\\\\\n=\sqrt{\not3\times \frac{16}{\not3}}+\frac{3}{5}-\frac{3}{5} +5\\\\\\n=\sqrt{16}+0+5\\\\\\n=4+5\\\\\\\boxed{\bf n=9}[/tex]
