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Bess [88]
3 years ago
12

2x - y = 5

Mathematics
2 answers:
goldfiish [28.3K]3 years ago
6 0
Im pretty sure that the answer it is A. 7
because if you subtract 2 from 7 you get 5
Lesechka [4]3 years ago
5 0

The two equations are,

1. 2 x- y=5

2. x + 3 y =7

To determine the y-determinant, we will evaluate

\begin{vmatrix} 2& 5\\  1& 7\end{vmatrix}\\\\\\=14-5=9\\\\ As,D= \begin{vmatrix} a& b\\  c& d\end{vmatrix}\\\\ D= a d - b c

Option (B)→ 9 is correct y-Determinant.

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