A baseball stadium holds 15,002 seats. The lower level has 50 fewer than three times as many seats as the upper level. The middle level has 40 more than twice as many seats as the upper level. Let x represent the number of upper-level seats. Which equation represents this scenario?
x + (2x + 20) + (3x – 50) = 15,002
x + (2x + 40) + (3x – 50) = 15,002
x + 2(20 + x) + 3(50 – x) = 15,002
x + 2(x + 20) + 3(x – 50) = 15,002