Question: Solve the equations x 1 + 2x 2 - 2x 3 = 5, x 1 - x 2 + x 3 = -1, x 1

Solve the equations    

x1 + 2x2 - 2x3 = 5,    x1 - x2 + x3 = -1,    x1 - x2 - x3 = 1    

Using the matrix equation x = A-1 C.

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