ax+2y=5, 3x-6y=20 in the system of equations above, a is a constant. if the system has one solution, which of the following cannot be the value of a...? Mcqs

ax+2y=5, 3x-6y=20 in the system of equations above, a is a constant. if the system has one solution, which of the following cannot be the value of a...?

(A) -1

(B) 4

(C) 1

(D) -3