The system of equations x1 + 2x2 + x3 = 9, 2x1 + x2 + 3x3 = 7 can be represented as?
- [1 2, 2 1, 1 3] [x1, x2, x3] = [9 7]
- [3 1, 2 1, 1 2] [x1, x2, x3] = [9 7]
- [1 2, 2 1, 1 3] [x1, x2, x3] = [7 9]
- None of these
Explanation
System:
x1 + 2x2 + x3 = 9
2x1 + x2 + 3x3 = 7
Matrix form AX = B:
[1 2 1] [x1] [9]
[2 1 3] [x2] = [7]
[x3]
Augmented matrix [A|B]:
[1 2 1 | 9]
[2 1 3 | 7]
Last verified on 04-06-2026
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