For any number $x$, we are told that $x\&=7-x$ and $\&x = x -7$. What is the value of $\&(15\&)$?
Question:
For any number $x$, we are told that $x\&=7-x$ and $\&x = x -7$. What is the value of $\&(15\&)$?
Answer:
Let's think step by step.

user
-15
For any number $x$, we are told that $x\&=7-x$ and $\&x = x -7$. What is the value of $\&(15\&)$?
train