Since you don't have a picture to go with this, I'll try to explain it the best I can. Each point in the shape you have to translate will move to the left 5 units. We would use (x, y) to figure out how to move it. Whatever number is in the x place in (x, y) will be decreased by 5. For example, if there was a point on (6, 3) and I had to translate it 5 units left, I would just do 6 - 5 and my answer would be (1, 3). Then you can do that for each point.
