Aniko
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Question 15·Hard·Linear Equations in Two Variables

In the xyxy-plane, the graphs of the equations in the following system are the same line.

(2k−1)x+12y=186x+(k+3)y=12\begin{aligned} (2k-1)x+12y&=18\\[1.4em] 6x+(k+3)y&=12 \end{aligned}

Which choice gives the value of kk?