Verified answer

[tex]\displaystyle\bf\\\left \{ {{x-3y=4} \atop {2x-y=3}} \right. \\\\\\\boxed{x=3y+4}[/tex]

Объяснение:

[tex]x - 3y = 4 \\ 2x - y = 3 \\ x = 4 + 3y \\ 2(4 + 3y) - y = 3 \\ 8 + 6y - y = 3 \\ 5y = - 5 \\ y = - 1 \\ x = 1[/tex]