Answer
$-5x+C$
Work Step by Step
$\displaystyle \int(-5)dx=\quad$...Constant MultipIe Rule
=$(-5)\displaystyle \int 1\cdot dx$=$(-5)\displaystyle \int x^{0}dx$
...Power Rule $,n=0\neq-1$
$=(-5)\displaystyle \frac{x^{0+1}}{0+1}+C$
$=-5x+C$