-x+6 ??? im not 100% sure
Short Answer: Combine like terms
Remark
Just from what I see here, remove the brackets first and combine like terms second.
Discussion
8 - 2x + 4 The like therms are 8 and 4 First step
12 - 2x That's the answer. Don't go any further. 2nd and last step
The distance between the points (2,1) and (14,6) on a coordinate is C. 13 units