5.7 Redundant Equations

The system

contains a redundant equation. Converted to a matrix and then reduced, this is:

[(2, 6, 2), (4, 2, -6), (4, 4, -4)]	[(1, 0, -2), (0, 1, 1), (0, 0, 0)]
(a) Matrix	(b)Reduced form

The last row in Figure 5.2 (b) means 0⋅x+0⋅y=0 which is always true. The solution can be read from the first two rows: (x=-2, y=1).