Solving linear equations with an unknown constant?

Solving linear equations with an unknown constant?

I have an augmented matrix in the from: $$\begin{bmatrix} 1 & h & -5\\ 2 &
-8 & 6 \end{bmatrix} $$ If I take -2*Row1 + Row2 I end up with
$$\begin{bmatrix} 1 & h & -5\\ 0 & -2h-8 & 16 \end{bmatrix} $$ My question
is two-fold, (a) is this the correct strategy for solving this type of
problem and (b) where do I go from here?
My first inclination is to solve for (-2h-8)x_2 = 16
I am not looking for the direct answer just a nudge in the right direction.