Răspuns:
(x,y)=(-24/85;-457/170);
/-este linia de fractie
Explicație pas cu pas:
x+2y=11 2y=11-x 2y=11-x 2y=11-x 2y=11-1 y=5
8x-2y=-2 8x-2y=-2 8x-(11-x)=-2 x=1 x=1 x=1
(x,y)=(1,5)
x+3y=-10 x=-10-3y x=-10-3y x=10-3×(-3) x=-1
-x+2y=-5 -(-10-3y)+2y=-5 y=-3 y=-3 y=-3
(x,y)=(-1,-3)
2x-3y=7,5 2x-3y=7,5 2x-3(-4,1-5x)=7,5 x=-24/85
5x+y=-4,1 y=-4,1-5x y=-4,1-5x y=-4,1-5×(-24/85
x=-24/85
y=-457/170 (x,y)=(-24/85;-457/170)
