{x + y = 3,
{2x - y = 3;
_
{x + y = 3
{y = 2x -3
{3x - 3 = 3,
{y = 2x - 3;
{3x = 6,
{x = 2,
{y = 4- 3;
{y = 1;
{x + y = 3,
{2x - y = 3;
_
{x + y = 3
{y = 2x -3
_
{3x - 3 = 3,
{y = 2x - 3;
_
{3x = 6,
{y = 2x - 3;
_
{x = 2,
{y = 4- 3;
_
{x = 2,
{y = 1;