Solve the following math problem step by step. The last line of your response should be of the form Answer: \boxed{$Answer} where $Answer is the answer to the problem.

<image>Use rectangle LMNP, parallelogram LKMJ to solve the problem.
If $M K=6 x, K L=3 x+2 y,$ and $J N=14-x$
find $y$