Latest book Aptitude Question SOLUTION: Which system(s)of equations has no solution? 1. y = 3x - 1 and y = 3x + 1 2.x + y = 1 and y = -x + 3 3. y = 1.5x - 2 and y = 3/2 X + 2 4. 2X + Y = 4X + 2