Which of the following systems of equations has the solution (-2,1)
1. x -4y = 8 and 3x + 10 = 2y
2. y = -2x - 2 and 2x - 2y = 5
3. 2x - y = -5 and x + 2y = 10
4. y = -3/2x -2 and 2x - y = -5
1 answer
2. y = -2x - 2 and 2x - 2y = 5