ZoetEmerald ZoetEmerald 28-01-2020 Mathematics contestada Which system of equations has exactly one solution? 2 x - 4 y = 8. x + y = 7. 3 x + y = - 1. 6 x + 2 y = - 2. 3 x + 3 y = 3. -6 x -6 y = 3. 3 x - 2 y = 4. - 3 x + 2 y = 4.