{2x+11y=-2; x=5+3y
Получаем 2(5+3y)+11y=-2
10+6y+11y=-2
17y=-2-10
17y=-12
y=-12/17
x=5+3*(-12/17)
x=49/17
(x;y) =(49/17; -12/17)
{2x+11y=-2; x=5+3y
Получаем 2(5+3y)+11y=-2
10+6y+11y=-2
17y=-2-10
17y=-12
y=-12/17
x=5+3*(-12/17)
x=49/17
(x;y) =(49/17; -12/17)