[tex] \frac{2x-y}{x+y} = \frac{ \frac{6y}{4}-y }{ \frac{3y}{4} +y} = \frac{ \frac{6y-4y}{4} }{ \frac{3y+4y}{4} } [/tex][tex] \frac{x}{3} = \frac{y}{4} =\ \textgreater \ 4x=3y=\ \textgreater \ x= \frac{3y}{4} [/tex]
[tex] \frac{ \frac{2y}{4} }{ \frac{7y}{4} } = \frac{2y}{4} * \frac{4}{7y} = \frac{2}{7} [/tex]
