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Question

Determine the coefficient matrix, A, the right-hand side vector, b, and the augmented matrix,

A#A ^ { \# }

of the given system.

x1+2x23x3=1,2x1+4x25x3=2,7x1+2x2x3=3.\left. \begin{array} { r } { x _ { 1 } + 2 x _ { 2 } - 3 x _ { 3 } = 1 }, \\ { 2 x _ { 1 } + 4 x _ { 2 } - 5 x _ { 3 } = 2 }, \\ { 7 x _ { 1 } + 2 x _ { 2 } - x _ { 3 } = 3 }. \end{array} \right.

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