Răspuns:
[tex] \frac{x}{y} = \frac{5}{4} \\ x = 5 \\ y = 4 \\ \frac{4x - 5y + 10}{ 3 + 8x - 10y} = \frac{4 \times 5 - 5 \times 4 + 10}{3 + 8 \times 5 - 10 \times 4} = \frac{20 - 20 + 10}{3 + 40 - 40} = \frac{10}{3} [/tex]
[tex] \frac{x}{y} = \frac{10}{2} \\ x = 10 \\ y =2 \\ \frac{6x - 2y}{7x - 3y} = \frac{6 \times 10 - 2 \times 2}{7 \times 10 - 3 \times 2} = \frac{60 - 4}{70 - 6} = \frac{56}{64} = \frac{7}{8} [/tex]
