2 numbers a and b vary directly if ab =k, k is a constant is it correct​

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

What’s -11-33k and factor each expression completely

Having a hard time understanding this question (see attachment).