Answer
a. $−a−5$
b. $x−31$
c. $ −4x+12$
d. $−6m+9n$
Work Step by Step
The multiplication property of $-1$ states that $-(x)$ is the same thing as $-1(x)$.
Apply the distributive property to each expression:
for a, you should get
$\boxed{-a-5}$
for b, you should get
$\boxed{x-31}$
for c, you should get
$\boxed{-4x+12}$
for d, you should get
$\boxed{-6m + 9n}$
