Rozwiąż układy równań metodą podstawiania (x+y=3 (x-2y=6

x+y=3 x-2y=6 x=3-y 3-y-2y=6 x=3-y -3y=6-3 x=3-y -3y=3/:(-3) x=3-y y=-1 x=3+1 y=-1 x=4 y=-1

(x+y=3 (x-2y=6 (x=3-y (3-y-2y=6 (x=3-y (3-3y=6/(-3) (x=3-y (y=2 (x=3-2 (y=2 (x=1 (y=2

x+y=3 x-2y=6 x=3-y 3-y-2y=6-y x=3-y -3y+y=6-3 x=3-y -2y=3 x=3+1,5 y=-1,5 x=4,5 y=-1,5