Question: Solve the equation: 3x 1 + 4x 2 + 5x 3 = 25, 4x 1 + 3x 2 6x 3 = 7, x 1

Solve the equation:
3x1 + 4x2 + 5x3 = 25,
4x1 + 3x2 − 6x3 = −7,
x1 + x2 + x3 = 6.

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