Question: 3x1 - x2 + x3 = 4 - x1 + 7x2 - 2x3 = 1 2x1 + 6x2 - x3 = 5 Solve by Cramer's

3x1 - x2 + x3 = 4
- x1 + 7x2 - 2x3 = 1
2x1 + 6x2 - x3 = 5
Solve by Cramer's rule, where it applies.

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