Matematika B - 2015. jesen, 14.

$2x+3y-1=02\; x+3\; y-1=0$

$2x-3y-7=02\; x-3\; y-7=0$

$\frac{2}{3}x-y-1=0\backslash frac\{2\}\{3\}\; x-y-1=0$

$\frac{2}{3}x+y-7=0\backslash frac\{2\}\{3\}\; x+y-7=0$