How would i answer this if it’s operation on functions

Write the equation below the represents the line passing through the point (-3, -1) negative one with a slope of 4

Solve for x i'll try to attach the files bc it's not letting me for some reason

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?