Trapezoid RS TV has median If VT = 4x - 6 and UK = 3x + 2 and RS = x + 12, find x?

Perhaps UK is the median.
  2(UK) = VT + RS
  2(3x+2) = (4x-6) + (x+12)
  6x + 4 = 5x + 6
  x + 4 = 6
  x = 2