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[" 7) If "x=a,y=b,z=c" is a solution of ...

[" 7) If "x=a,y=b,z=c" is a solution of the system "],[" of linear eq "^(" ns ")x+8y+7z=0],[9x+2y+3z=0,x+y+z=0" such that point "],[(a,b,c)" lies on the plane "],[x+2y+6=-z" then "2a+b+c=],[[" 1) "-1," 2) "0," 3) "1," 4) "2]]

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