{2x+y=11
{3x -y = 9
{y = 11 -2x
{3x- y = 9
3x - (11- 2x) = 9
x = 4
y = 11 - 2 * 4
y = 3
ответ: (4, 3)
{2x+y=11
{3x -y = 9
{y = 11 -2x
{3x- y = 9
3x - (11- 2x) = 9
x = 4
y = 11 - 2 * 4
y = 3
ответ: (4, 3)