Solve: x + y = 5, x - y = 1. What is x?
For the same equations (x + y = 5, x - y = 1), what is y?
Solve: 2x + y = 7, x + y = 4. What is x?
For 2x + y = 7, x + y = 4, what is y?
Solve: 3x + 2y = 12, x - y = 1. What is x?
For 3x + 2y = 12, x - y = 1, what is y?
Which method is best for x + y = 6, x - y = 2?
Solve: y = 2x + 1, y = x + 3. What is x?
For y = 2x + 1, y = x + 3, what is y?
How many solutions do parallel lines have?
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