This looks like you picked up the algebra in the middle of a problem. Could you please state the original problem? Thanks!
Ok. That makes more sense now. Your first step is fine, although I would probably leave the 7 on the RHS. Different people complete the square in different ways.
. I pulled the 2x over to the LHS.
. I added the square of half the coefficient of the x term to both sides. Then you get
. From here, it looks as though you've solved the rest of the problem.