Let $A=\begin{bmatrix}
1 & 3 & 7 & 9 \\
2 & 4 & 6 & 8 \\
0 & 1 & 3 & 2 \\
\end{bmatrix} $ . What is the order of $A$?
Answer & explanation
Correct answer: option 1
Since the given two matrices are equal they are entry wise equal. So we get four equations from this. Solving any two of these would give values of $x$ and $y$.