Given the following simultaneous linéar équations! X1 + X2 + 2X3 = 18 %3D X1 - 3X3 = -16 %3D X1 - 2X2 + 6X3 = 30 . Continued Page 2 I Find X1, X2, and X3 using Excel and utilizing matrix form by doing the following:

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A:

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A:

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A: see 2nd step