How do you solve this problem?

I x + 2 I -8 = 6

I x + 2 I = 6 + 8

I x + 2 I = 14

From the definition of absolute value: 

You need to keep in mind that |x| = |-x|, so 

you need to solve: (x + 2) = 14 and -(x + 2) = 14

x + 2 = 14

x = 12 

-x -2 = 14

x = -16

The answer to your question is i think 7