Matematika B - 2014. jesen, 9.

A. $x-y+2=0i2x-y+2=0x-y+2=0\; ~i~\; 2\; x-y+2=0$

B. x-y+1=0 ~ i  ~ x+y=0

C. $2x-y+3=0i2x+y+3=02\; x-y+3=0\; ~\; i\; ~\; 2\; x+y+3=0$

D. $2x-y-1=0i2x-y-3=02\; x-y-1=0\; ~\; i\; ~\; 2\; x-y-3=0$