Solve the set of equations, using Cramers rule: 3x 1 + x 2 + x 3 =

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Solve the set of equations, using Cramer’s rule:
3x1 + x2 + x3 = 19,
x1 − 2x2 + 3x3 = 13,
x1 + 2x2 + 2x3 = 23.

Verify your result using Mathematica.

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