Question: In each case, express every solution of the system as a sum of a specific solution plus a solution of the associated homogeneous system. (a)

In each case, express every solution of the system as a sum of a specific solution plus a solution of the associated homogeneous system.
(a) x - y - 4z = - 4
x + 2y + 5z = 2
x + y + 2z = 0
(b) 2x1 + x2 - x3 - x4 = - 1
3x1 + x2 + x3 - 2x4 = - 2
- x1 - x2 + 2x3 + x4 = 2
- 2x1 - x2 + 2x4 = 3

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