$3 x+2 y+2 z=9....(2)$
$x-y+4 z=8....(3)$
$(1)-(2) \Rightarrow-x+y=0 \Rightarrow x-y=0$
from $(3) 4 z=8 \Rightarrow z=2$
from $(1)$ $2 x+3 y=5$
$\Rightarrow x=y=1$
$\therefore$ system has unique solution
$2 x-y+3 z=5$
$3 x+2 y-z=7$
$4 x+5 y+\alpha z=\beta$
માટે નીચેના માથી ક્યૂ સાચું નથી?