The argument of the absolute value function is positive for any x > -7. The required domain is a subset of that, so the absolute value function does not change its argument.
14/5 is the same as 2 4/5. 5 goes evenly into 14 twice, which gives us the 2. 14-10 is 4, so we have 4/5. I hope this made sense. if it didn't please tell me and i can try to explain it better
