(2 8/9x -2 1/4):2 1/2=3/5 решите

Решите задачу:

$(2 \frac{8}{9} x - 2 \frac{1}{4} ) \div 2 \frac{1}{2} = \frac{3}{5} \\ \\ ( \frac{26}{9} x - \frac{9}{4} ) \div \frac{5}{2} = \frac{3}{5} \\ \\ ( \frac{26}{9} x - \frac{9}{4} ) \times \frac{2}{5} = \frac{3}{5} \\ \\ \frac{52}{45} x - \frac{9}{10} = \frac{3}{5} \\ \\ 104x = 54 + 81 \\ \\ 104 x = 135 \\ \\ x = \frac{135}{104} \\ \\ x = 1 \frac{31}{104}$