| 1. |
-4x + y - z = -10
-9x - y + 4z = -37
-8z = 56
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| 2. |
-7x - y - 6z = -87
5x + 5y - 6z = -21
x = 8
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| 3. |
-6x + y - z = -4
7z = 7
-10x - 12y - 3z = 33
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| 4. |
-9z = 36
x - 5y + 2z = -9
8x - y - 9z = 67
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| 5. |
8x + 12y - 3z = 62
-11x - 4y - z = 8
-7x = 14
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| 6. |
2x - 10y - z = 88
-5z = -40
-x - y - 4z = -26
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| 7. |
-3y = 150
x + 7y - 9z = -48
-2x + 2y + z = -194
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| 8. |
2x - 5y - 11z = 447
x = 12
-x - y + z = -1
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| 9. |
4x + 3y - z = -329
-6x = 240
4x - 3y - z = -53
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| 10. |
3x - 4y - 2z = -266
-x - 6y + 9z = 147
4z = 116
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| 11. |
-12x - y - 10z = 1040
-3x - 3y + 2z = -32
7z = -343
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| 12. |
-7x = 70
-3x - 2y + 5z = -1
-x - 3y + 3z = 31
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| 13. |
6x + 4y - 12z = 364
x - 2y - 2z = 106
-2y - 5z = 249
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| 14. |
-10x + 8z = -714
-7x + 9y + 5z = -102
-4x - 5y - 4z = -258
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| 15. |
-x + y - 5z = -87
-x - 3y + z = -73
2x + 6y - 3z = 119
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| 16. |
-12x + 10y - 8z = -352
2x - y - 4z = -172
4x + 5y + 3z = -19
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| 17. |
x - 5y - 11z = 698
x - 4y - 3z = 299
-x + 9y - 7z = -94
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| 18. |
-4x + 3y + 3z = -209
-6x - y - 8z = -209
-9x + 4y - 7z = -418
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