If $\left[\begin{array}{cc}x-1 & 2y \\ x+y & 3\end{array}\right]=\left[\begin{array}{cc}3x-7 & y^2-3 \\ 6 & y\end{array}\right]$,then $\{(x, y)\} = $ . . . . . .
- A$\{(3, 1)\}$
- B$\{(3, -1), (3, 3)\}$
- C$\{(3, -1)\}$
- D$\{(3, 3)\}$
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