Решите уравнение у-5/9у=3,6. СРОЧНО!!!

[tex]y- \frac{5}{9} y=3.6; \\ \frac{9}{9} y-\frac{5}{9} y=3.6; \\ \frac{4}{9}y=3.6; \\ y=3.6:\frac{4}{9}; \\ y=3.6*\frac{9}{4}; \\ y=0.9*9; \\ y=8.1.[/tex]

у-5/9у=3.6
у+9у=5+3.6
10у=8.6
у=8.6:10
у=0.86