Write all the steps.
-x - y = 9
5x + y =-13
3x + 8y = 2
-5x - 8y = -14
7x + 4y = -27
7x - 4y = 13
-7x + 3y = 26
2x - 3y = -1
3x - 2y = - 21
7x + 2y = -29
7x + 9y = 23
-5x -9y = -23