8/15y-3/10y+3/5y=0,5

8/15y-3/10y+3/5y=0,5    *30y16-9+18=15y25=15yy=5/3 

[latex] \frac{8}{15y} - \frac{3}{10y} + \frac{3}{5y} =0,5 \\ \\ \\ \frac{8*2}{30y} - \frac{3*3}{30y} + \frac{3*6}{30y} =0,5 \\ \\ \\ \frac{16}{30y} - \frac{9}{30y} + \frac{18}{30y} =0,5 \\ \\ \\ \frac{16-9+18}{30y} =0,5 \\ \\ \\ \frac{25}{30y} = \frac{5}{10} \\ \\ \\ 30y*5=25*10 \\ \\ \\ 150y=250 \\ \\ \\ y=250 : 150 \\ \\ \\ y = \frac{5}{3} \\ \\ \\ y=1 \frac{2}{3} [/latex]