Fixing a split seam on pant? I have a couple of black pants on which the side seam...

I have a couple of black pants on which the side seam is coming apart right below the bottom side of the side pocket. I lately want to get it sewn up but can't find any simple directions on how to do it. The split is I don`t know an inch long or so.
Answers:    Take a needle and thread and using exceedingly small stitches sew it up from the inside, don't forget to put a knot on the extremity of your thread.
Sew it.