Answer:
∠ WXU = 56°
Explanation:
Since WX is a midline then WX and TV are parallel lines, thus
∠ WXU and ∠ TVX are corresponding and congruent, then
8x + 24 = 60 - x ( add x to both sides )
9x + 24 = 60 ( subtract 24 from both sides )
9x = 36 ( divide both sides by 9 )
x = 4
Thus
∠ WXU = 60 - x = 60 - 4 = 56°