creating linear inequalities

Question

Travis practices his guitar for at least 10 hours per week. He practices for half an hour each session. If Travis has already practiced for 4 hours this week, how many more sessions remain for him to meet the weekly hours?

Answer 1

He has practiced 4 hours so far so he has 6 hours left to practice (10-4=6)

1 hour=2 practice sessions

So 4 hours * 2 practice sessions an hour= 8 practice sessions left.

Answer 2

He needs to practice 6 hours (10 - 4)

6 / 0.5 = ?