{x-3y =4
{2x-y=3
{x = 3y+4
{2(3y+4)-y=3
{6y+8-y=3
{5y=3-8
{5y=-5
{y=-1
{x = 3*(-1)+4
{x = 1
ответ: (1; -1)
{x-3y =4
{2x-y=3
{x = 3y+4
{2(3y+4)-y=3
{x = 3y+4
{6y+8-y=3
{x = 3y+4
{5y=3-8
{x = 3y+4
{5y=-5
{x = 3y+4
{y=-1
{x = 3*(-1)+4
{y=-1
{x = 1
{y=-1
ответ: (1; -1)