To solve the system of equations using the elimination method:

1. Given the equations:

   8x + y &= -16 \\ -3x + y &= -5 \end{align*}$$

2. Subtract the second equation from the first to eliminate $y$: $(8x + y) - (-3x + y) = -16 - (-5)$ $8x + y + 3x - y = -16 + 5$ $11x = -11$

3. Solve for $x$: $x = \frac{-11}{11} = -1$

So, the $x$-value in the solution to this system of equations is $-1$. The correct answer is D. $-1$.