Mashaal Masha
$$y=6x+18$$

One of the equations in a system of two linear equations is given. The system has no solution. Which equation could be the second equation in the system?
Difficulty: Hard
A: 

$-6x+y=18$

B: 

$-6x+y=22$

C: 

$-12x+y=36$

D: 

$-12x+y=18$

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