Odpowiedź:
[tex]\left \{ {{x = 2y - 14} \atop {2 * (2y -14) - y = -10}} \right.[/tex]
[tex]\left \{ {{x = 2y - 14} \atop {3y = 18}} \right.[/tex]
[tex]\left \{ {{x = 2y - 14} \atop {y=6}} \right.[/tex]
[tex]\left \{ {{x=-2} \atop {y=6}} \right.[/tex]
