This answer for this is 0 because they will cancel each other out
To solve this, you need to isolate/get the variable "x" by itself in the equation:
2x - 1 - 7 = 9 First you can combine -1 and -7
2x - 8 = 9 Now add 8 on both sides
2x - 8 + 8 = 9 + 8
2x = 17 Divide 2 on both sides to get "x" by itself
or x = 8.5
PROOF:
2x - 1 - 7 = 9
2x - 8 = 9 Substitute/plug in 8.5 into "x" since x = 8.5
2(8.5) - 8 = 9
17 - 8 = 9
9 = 9
The answer is C. you can check the attached picture.
Answer:
11 or I'm just bad at math