Respuesta :



[tex] \frac{r}{3} - \frac{2}{y} = \frac{s}{5} \\ \\ - \frac{2}{y} = \frac{s}{5} - \frac{r}{3} \\ \\ \frac{2}{y}= \frac{r}{3} - \frac{s}{5} \\ \\ \frac{2}{y}= \frac{5r - 3s}{15} \\ \\ \frac{1}{y}= \frac{5r - 3s}{30} \\ \\ y= \frac{30}{5r -3s} [/tex]