The value of k such that the lines $2x-3y+k=0,3x-4y-13=0$ and $8x-11y-33=0$ are concurrent , is

Question

\[\begin {array} {1 1} (1)\;20 & \quad (2)\;-7  \\ (3)\;7 & \quad (4)\;-20 \end {array}\]