453. Решите уравнение: 1) 25/27 x = 5/18; 2) 13/17 x = 39; 3) 4x = 5/7; 4) x : 2 2/15 = 1 9/16; 5) 4 4/9 : x = 5/27; 6) 1 4/9 x = 5,2.

1. \(x=\frac5{18}:\frac{25}{27}=\frac3{10}\).
2. \(x=39:\frac{13}{17}=51\).
3. \(x=\frac57:4=\frac5{28}\).
4. \(x=2\frac{2}{15}\cdot1\frac9{16}=\frac{32}{15}\cdot\frac{25}{16}=\frac{10}{3}\).
5. \(x=4\frac49:\frac5{27}=\frac{40}{9}\cdot\frac{27}{5}=24\).
6. \(5{,}2=\frac{26}{5}\), поэтому \(x=\frac{26}{5}:1\frac49=\frac{26}{5}:\frac{13}{9}=\frac{18}{5}=3{,}6\).

Ответ: 1) \(\frac3{10}\); 2) 51; 3) \(\frac5{28}\); 4) \(\frac{10}{3}\); 5) 24; 6) 3,6.