Question

Suppose the first equation in a system of two linear equations is 12x + 7y = 25. The second equation being which of these will cause the system to have no solution?

A.
12x + 7y = 20
B.
12x + 7y = 25
C.
12x + 9y = 20
D.
12x + 9y = 25

Answer 1

A. 12x + 7y = 20

Explanation:

Obviously, 12x + 7y cannot both be equivalent to unique [different] quantities.