Answer
$\left[\begin{array}{rr}
-1 & -2 & 1\\
-5 & 5 & -3
\end{array}\right]$
Work Step by Step
$A=\left[\begin{array}{lll}
1 & -1 & 0\\
0 & 2 & -1
\end{array}\right],\quad B=\left[\begin{array}{lll}
3 & 0 & -1\\
5 & -1 & 1
\end{array}\right],\quad C=\left[\begin{array}{lll}
x & 1 & w\\
z & r & 4
\end{array}\right]$
$(2A-B)_{ij}=2\cdot a_{ij}-b_{ij}$
---
$2A-B=\left[\begin{array}{lll}
2(1)-3 & 2(-1)-0 & 2(0)-(-1)\\
2(0)-5 & 2(2)-(-1) & 2(-1)-1
\end{array}\right]$
$=\left[\begin{array}{lll}
-1 & -2 & 1\\
-5 & 5 & -3
\end{array}\right]$
