152. Solve for x
^{ Solving: If x = 7, x = ?}
Restating: What's the negative of 7?
^{The negative of negative is positive.}
^{ (7) = 7}
_{ The answer is 7.}
Note: (7) = +7. (+7) = 7.
Question: Given x = 9, what does x = ? What is

(+9) ?