Three multiplied by a number increased by four totals one

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

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 is the value of f(x) = 2.2 for f(-2)?