when you do your first step, do it with an "=" first.. just ignore > or <..

for the second one, if you see or , instead of a solid line, draw a dashed line.. "<- - - - - - - - ->"; however, if you see or , draw the solid one..

for your third one, just pick points not on your lines, substitute it to your system of equations and shade that part where your point belongs if it satisfies the inequalities.. if not, pick another points from other part of the plane..