If $x+y=12$ and $x-y=8$, what is the value of $2x-xy$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $x+y=12$ and $x-y=8$, what is the value of $2x-xy$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
0
If $x+y=12$ and $x-y=8$, what is the value of $2x-xy$?
train