what is -9x + x

-9x + x = -8x

hee hee

$${\mathtt{\,-\,}}{\mathtt{9}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,\small\textbf+\,}}{\mathtt{x}} = \underset{{\tiny{\text{Error: Unknown Identifier}}}}{{\mathtt{x}}}{\mathtt{\,-\,}}{\mathtt{9}}{\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unknown Identifier}}}}{{\mathtt{x}}}\right)$$

Here you go again....as they say....I was stumped.....you can't solve

Yep....I waiting for another question......