Question: Each of the given linear systems is in reduced row echelon form. Solve the system. (a) x - 2z = 5 Y + z =

Each of the given linear systems is in reduced row echelon form. Solve the system.
(a) x - 2z = 5
Y + z = 2
(b) x = 1
y = 2
z - w = 4

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