[tex] \frac{x}{y}= \frac{2}{3}=\ \textgreater \ 3x=2y =\ \textgreater \ y= \frac{3x}{2} \\ \\ \frac{5x}{y}= \frac{5x}{\frac{3x}{2}}=\frac{5x}{1}*\frac{2}{3x}=\frac{10}{3}. \\ \\ \frac{2x+y}{x-y}=\frac{2x+ \frac{3x}{2}}{x-\frac{3x}{2}}=\frac{\frac{4x+3x}{2}}{\frac{2x-3x}{2}}=\frac{7x}{2}:\frac{-x}{2}=\frac{7x}{2}*\frac{2}{-x}=\frac{7}{-1}=-7.[/tex]
/robertinni
