Solve the following system of equations:

(1) 3x + 4y = -14
9x + 9y = -18

(2) 5x + 6y = -32
8x + 3y = -38

(3) 4x + 8y = 52
7x + 7y = 42

(4) 2x + 2y = -14
6x + 5y = -38

(5) 9x + 3y = 60
6x + 9y = 96

(6) 4x + 6y = 2
2x + 8y = -14

(7) 8x + 4y = -52
5x + 7y = -10

(8) 3x + 5y = -19
7x + 2y = 4

(9) 3x + 4y = 10
4x + 5y = 14

(10) 2x + 8y = -34
7x + 2y = -15