Solve linear equations
1. 8x + 3y = 3
x + y = 7

2. 4x + 2y = 0
x + y = 6

3. 6x - 7y = 26
3x - 8y = 10

4. 4x + 3y = -4
4x + 5y = -23

5. 2x + 2y = 14
5x + 2y = -3

6. x - 3y = 10
2x - y = 22

7. 5x + 4y = 28
3x + 2y = -1

8. 3x - 4y = 14
5x - 8y = 1