Find a matrix `A` such that $ A \begin{bmatrix} 4 & -2 \\ 0 & 5 \end{bmatrix} + \begin{bmatrix} -1 & 3 \\ -9 & 6 \end{bmatrix} = \begin{bmatrix} 3 & 16 \\ 7 & 8 \end{bmatrix} $