![A+B=\left[\begin{array}{cc}8&-3\\3&y+2\end{array}\right]+\left[\begin{array}{cc}3x&z+4\\w&\frac{1}{2}y\end{array}\right]=\left[\begin{array}{cc}8+3x&-3+z+4\\3+w&y+2+\frac{1}{2}y\end{array}\right].](/tpl/images/0268/1717/653e2.png)
![B=\left[\begin{array}{cc}-12&5\\1&-2\end{array}\right].](/tpl/images/0268/1717/f32d2.png)
What is the value of matrix b if a + b = c
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