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

A. x + y = 5 and 2x + 2y = 10

B. x - y = 1 and x + y = 3

C. 2x + 3y = 6 and 4x + 6y = 12

D. x + y = 2 and x + y = 4

E. None of the above

Answer: D. x + y = 2 and x + y = 4

The equations x + y = 2 and x + y = 4 represent parallel lines that will never intersect, indicating no solution exists.

Posted in: Linear Equations - Algebra - Mathematics