JEE Main 20179 Apr, Morning shiftMathematicsMediumThree Dimensional Geometry249× since 2002
If x = a, y = b, z = c is a solution of the system of linear equations
x + 8y + 7z = 0
9x + 2y + 3z = 0
x + y + z = 0
such that the point (a, b, c) lies on the plane x + 2y + z = 6, then 2a + b + c equals :