The first step to answering this question is combining all like terms.
A. 2x + 2 + 2x + 3x - 8 The like terms in this expression are the x terms and the constants So, what you would do is combine all of the x terms and combine all of the constants
(2x + 2x +3x) + (2 - 8) 7x - 6
B. 4 + 7x - 2 In this expression, you would combine all of the constants
7x + (4 - 2) 7x + 2
C. -2 + 5x + 2x - 4 For this expression, you would again, combine all of the x terms and all of the constants.
-2 + 5x + 2x - 4 (5x + 2x) + (-2 - 4) 7x - 6
D. 8x - x - 6 For this expression, you would combine all of the x terms
8x - x - 6 (8x - x) - 6 7x - 6
Now let's look at all of the new answer choices: A. 7x - 6 B. 7x + 2 C. 7x - 6 D. 7x - 6
The question is asking you to find the one expression that's different. The only different one is B, so that's the answer.
