Răspuns:
[tex]\boldsymbol {\red{\bigg(\dfrac{5}{8}; - \dfrac{93}{8}\bigg)}}[/tex]
Explicație pas cu pas:
[tex]x + y = -11[/tex]
[tex]x - 9x-6 =-11[/tex]
[tex]-8x=-5\Rightarrow x = \dfrac{5}{8} [/tex]
[tex]f(\dfrac{5}{8}) = - \dfrac{9 \times 5}{8} - 6 = - \dfrac{45 + 48}{8} = - \dfrac{93}{8} \\ [/tex]
[tex]\Rightarrow y = - \dfrac{93}{8}[/tex]
