Răspuns:
[tex]b)x = \frac{15}{13} \: \: y = - \frac{16}{13} [/tex]
Explicație pas cu pas:
b
[tex] \frac{x}{2} + \frac{y}{3} = \frac{1}{6} | \times ( - \frac{1}{3}) | \\ \frac{x}{6} - \frac{y}{4} = \frac{1}{2} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ - \frac{x}{6} - \frac{y}{9} = - \frac{1}{18} \\ \frac{x}{6} - \frac{y}{4} = \frac{1}{2} \\ \\ - \frac{y}{9} - \frac{y}{4} = - \frac{1}{18} + \frac{1}{2} \\ - \frac{4y + 9y}{36} = \frac{9 - 1}{18} \\ - \frac{13y}{36} = \frac{8}{18}\\ y = - \frac{16}{13} \\ \\ \frac{x}{2} = \frac{1}{6} + \frac{16}{3 \times 13} = \frac{45}{78} \\ x = \frac{15}{13} [/tex]
