Introduction to Integers: example 3.5

Evaluate $- x :$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Evaluate $- n :$

How did it go?

ⓐ To evaluate $- x$ when $x = 8$ , substitute $8$ for $x$ .
	$- x$

Simplify.	$−8$

ⓑ To evaluate $- x$ when $x = −8$ , substitute $−8$ for $x$ .
	$- x$

Simplify.	$8$