consittent means they have an intersection point (at least 1 intersection point)
coincident means all points are same (same line) (infinity intersection points )
insconsisiten means they don't intersect at all (0 intersectioi points)
means they are paralell
divide last equation by 3
y=-x+(2/3)
other one is
y=-x-1
they are paralell since have same slope
differend y intercepts so inconsistine
