# Find the values of a,b,c and d from the question:$\begin{bmatrix}a-b & 2a+c\\2a-b & 3c+d\end{bmatrix}$ = $\begin{bmatrix}-1 & 5\\0 & 13\end{bmatrix}$
$\begin{array}{1 1} a=1 b=2 c=3 d=4 \\ a=3 b=4 c=1 d=2 \\ a=0 b=2 c=3 d=1\\ a=2 b=3 c=0 d=1 \end{array}$