For each system, determine whether it has a unique solution (in this case, find the solution), infinitely many solutions, or no solutions.
1. A. No solutions B. Infinitely many solutions C. Unique solution: D. Unique solution: E. Unique solution: F. None of the above
2. A. Unique solution: B. Unique solution: C. Unique solution: D. No solutions E. Infinitely many solutions F. None of the above
3. A. Unique solution: B. Unique solution: C. Infinitely many solutions D. No solutions E. Unique solution: F. None of the above
4. A. Unique solution: B. Infinitely many solutions C. No solutions D. Unique solution: E. Unique solution: F. None of the above
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