Provide an Appropriate Response $f ( x ) = x$ And $g ( x ) = 7 x - 5$

Multiple Choice

Provide an appropriate response.
-If $f ( x ) = x$ and $g ( x ) = 7 x - 5$ , find $( f - g ) ( x )$

A) $5 x - 6 x ^ { 2 }$
B) $2 \mathrm { x }$
C) $5 - 6 x$
D) $- 6 x - 5$