21 out of 25 question right what’s the grade

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Hi my sisters and brothers can tell me the answer because i don’t understand the question

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?