2x+5y=-11
x-3y=11
x=3y+11
2(3y+11)+5y=-11
6y+22+5y=-11
11y=-33
y=-3
x=-3.3+11
x=2
/x,y/=(2,-3)
xy=-6
Otvet: -6
2x+5y=-11
x-3y=11
2x+5y=-11
x=3y+11
2(3y+11)+5y=-11
x=3y+11
6y+22+5y=-11
x=3y+11
11y=-33
x=3y+11
y=-3
x=-3.3+11
y=-3
x=2
/x,y/=(2,-3)
xy=-6
Otvet: -6