Answer:
x = 20
Explanation:
the angle vertically opposite is congruent to (2x + 16)
then 2x + 16 and 6x + 4 are same-side interior angles and sum to 180°
sum the 2 angles and equate to 180
2x + 16 + 6x + 4 = 180
8x + 20 = 180 ( subtract 20 from both sides )
8x = 160 ( divide both sides by 8 )
x = 20