Which of the following pairs of equations represents a system that has no solution?

A. x + y = 5 and x + y = 10

B. 2x - y = 3 and 4x - 2y = 6

C. x - 2y = 4 and 2x - 4y = 8

D. 3x + y = 7 and 3x + y = 14

E. None of the above

Answer: A. x + y = 5 and x + y = 10

The equations x + y = 5 and x + y = 10 represent parallel lines that never intersect, hence no solution.

Posted in: Linear Equations - Algebra - Mathematics