rozwiaz uklad rownan metoda podstawiania 3x+2y=19 5x-y=10 x-y-3=0 2x+3y-11=0

3x+2y=19 5x-y=10/·2 3x+2y=19 10x-2y=20 13x=39 x=3 2y+9=19 y=5 x-y-3=0 2x+3y-11=0 x-y-3=2x+3y-11/+y+11 x+8=2x+4y x+4y=8 x=y+3 5y+3=8 y=1 x=4 Nie wiem czy dobrze D:

3x+2y=19 5x-y=10 -y=10-5x y=-10+5x→y=-10+5×3=5 3x+2×(-10+5x)=19 13x=39 x=3 x=3 y=5 x-y-3=0 2x+3y-11=0 x=3+y→y=3+1=4 2(3+y)+3y=11 6+2y+3y=11 5y=5 x=4 y=1 y=1