Question

All of the following expressions are equivalent except _____.

1. 2 - x
2. -2 + x
3. x - 2
4. x + (-2)

Answer 1

3. x-2

Explanation:

Let's start with 1. we know that 2-x is the same as -2+x and since addition can be written as -2+x or x+(-2) and equal the same thing, we know that x-2 is the one that is not equivalent.