Verified answer

Ответ:

[tex]\left \{ {{x=9} \atop {12x-y=11}} \right.[/tex]

12*9-у=11

108-у=11

-у=11-108

-у= -97

у= -97 : (-1)

у= 97

[tex]\left \{ {{x=9} \atop {y=97}} \right.[/tex]

Ответ: ( 9 ; 97)