Answer
X = $\begin{bmatrix}
-1 & \frac{3}{2} & -\frac{1}{2}\\
1 & 0 & \frac{5}{2}\\
\end{bmatrix}$
Work Step by Step
2X = A + B
X = $\frac{1}{2}$(A + B)
First perform A + B to get matrix Y:
Y = $\begin{bmatrix}
-2+0 & 1+2 & 3-4\\
-1+3 & 0+0 & 4+1\\
\end{bmatrix}$ = $\begin{bmatrix}
-2 & 3 & -1\\
2 & 0 & 5\\
\end{bmatrix}$
Then multiply matrix Y by the scalar multiple of $\frac{1}{2}$ to get X:
X = $\begin{bmatrix}
-2(\frac{1}{2}) & 3(\frac{1}{2}) & -1(\frac{1}{2})\\
2(\frac{1}{2}) & 0(\frac{1}{2}) & 5(\frac{1}{2})\\
\end{bmatrix}$ = $\begin{bmatrix}
-1 & \frac{3}{2} & -\frac{1}{2}\\
1 & 0 & \frac{5}{2}\\
\end{bmatrix}$
