The answers to your page the whole book is online with answer key
The answer to 1. (1, -2)
The answer to 2. (-2, -2)
The answer to 3. (4, -1/2)
The answer to 4. (3, -1/2)
The answer to 5. No solution.
The greatest common factor for 49 and 63 would be 7 since you can divide 7 into both numbers perfectly
