eliminating possible answer
(1,- 1)
(- 5, 1)
(0, 3)
(- 1,1)
problem
- 5x- 8y=17
2x- 7y=- 17
(1,- 1)
(- 5, 1)
(0, 3)
(- 1,1)
problem
- 5x- 8y=17
2x- 7y=- 17