Răspuns:
[tex] \frac{3x - y}{2x + y} = \frac{5}{4 } = > 12x - 4y = 10x + 5y = > 12x - 10x = 5y + 4y = > 2x = 9y = > 2 \times 9 = 9 \times 2 = > x = 9 \: \: y = 2 \\ [/tex]
