Operation Matrix

[afifhrz]

Let A=\begin{bmatrix} p & 1\\2 & 1 \end{bmatrix}, B=\begin{bmatrix}2&1\\3&q\end{bmatrix}, and C=\begin{bmatrix}2&1\\1&q\end{bmatrix}. If 2A-B=C, then p+q=…