If \[2x+3y-5z=7,x+y+z=6\], \[3x-4y+2z=1,\] then x = [MP PET 1987]

1.	If \[2x+3y-5z=7,x+y+z=6\], \[3x-4y+2z=1,\] then x = [MP PET 1987]
A.	\[\left\| \,\begin{matrix} 2 & -5 & 7 \\ 1 & 1 & 6 \\ 3 & 2 & 1 \\ \end{matrix}\, \right\|\div \left\| \,\begin{matrix} 7 & 3 & -5 \\ 6 & 1 & 1 \\ 1 & -4 & 2 \\ \end{matrix}\, \right\|\]
B.	\[\left\| \,\begin{matrix} -7 & 3 & -5 \\ -6 & 1 & 1 \\ -1 & -4 & 2 \\ \end{matrix}\, \right\|\div \left\| \,\begin{matrix} 2 & 3 & -5 \\ 1 & 1 & 1 \\ 3 & -4 & 2 \\ \end{matrix}\, \right\|\]
C.	\[\left\| \,\begin{matrix} 7 & 3 & -5 \\ 6 & 1 & 1 \\ 1 & -4 & 2 \\ \end{matrix}\, \right\|\div \left\| \,\begin{matrix} 2 & 3 & -5 \\ 1 & 1 & 1 \\ 3 & -4 & 2 \\ \end{matrix}\, \right\|\]
D.	None of these
Answer» D. None of these

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If \[2x+3y-5z=7,x+y+z=6\], \[3x-4y+2z=1,\] then x = [MP PET 1987]

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