Розв’яжіть наступну систему рівнянь:

(1) 4x + 8y = -12
5x + 4y = 15

(2) 6x + 6y = -18
9x + 2y = 15

(3) 7x + 7y = -7
3x + 5y = 7

(4) 2x + 3y = -14
8x + 9y = -32

(5) 8x + 5y = 22
9x + 3y = 9

(6) 5x + 8y = -51
4x + 2y = -32

(7) 6x + 9y = 27
2x + 4y = 6

(8) 3x + 6y = -12
7x + 7y = -21

(9) 6x + 9y = -12
7x + 2y = 37

(10) 5x + 5y = -70
3x + 4y = -50