MCQ
समीकरण $\left[\begin{array}{c}x+y+z \\ x+z \\ y+z\end{array}\right]=\left[\begin{array}{c}9 \\ 5 \\ 7\end{array}\right]$ में $x$ का मान है$-$
- A$3$
- B$4$
- C$5$
- ✓$2$
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