Verified answer

Ответ:

[tex]\left \{ {{3x-y=7} \atop {2x-3y=1}} \right.[/tex]

[tex]\left \{ {{y=3x-7} \atop {2x-3(3x-7)=1}} \right.[/tex]

[tex]20-7x=0\\[/tex]

[tex]x=\frac{20}{7}[/tex]

[tex]\left \{ {{y=3(\frac{20}{7} )-7} \atop {x=\frac{20}{7} }} \right.[/tex]

[tex]y=\frac{11}{7}[/tex]

Объяснение: