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3x-y=2
{2x=2y -4 / :2
3x-y=2
{x=y-2
3(y-2)=2
{x=y-2
3y-6=2
{x=y-2
3y=6+2
{x=y-2
3y=8 / :3
{x=y-2
y=2 i 2:3 (dwie całe i dwie trzecie )
x=2:3 (dwie trzecie )
3x- y= 2
2x= 4+2y /:2
3x- y= 2
x=2+y
3(2+y)- y= 2
x=2+y
6+3y- y= 2
x=2+y
2y= -4 /:2
x=2+y
y= -2
x= 2+-2
y= -2
x=0
y=-2