3x - 4y = 7 3x + 2y = -5 4/8/2013 | Savaughn from Mansfield, TX | 1 Answer | 0 Votes Mark favorite Subscribe Comment
3x - 4y = 7 -3x - 2y = 5 Since you are subtracting, you need to change the sign on each term -6y = 12 4/8/2013 | John R. Comment