Answer:
x = 5 , ML = 18
Explanation:
the midsegment NP of the trapezoid is half the sum of the bases, that is
NP =

25 =
( multiply both sides by 2 to clear the fraction )
50 = 10x ( divide both sides by 10 )
5 = x
Then
ML = 4x - 2 = 4(5) - 2 = 20 - 2 = 18