That's the answer I get. It's kind of hard to follow your work (you can use the formatting buttons to make subscripts and rxn arrows which makes it much easier for us to follow your work).
It seems like you're going about it the right way though. Enthalpy is a state function which means that no matter how you get there, going from one state to another results in the same change in enthalpy. Equation 1 is basically a combination of equations 2 and 3 if you multiply one and reverse the other.