Answer:
Step-by-step explanation:
A and B are supplementary angles since the lines are parallel
A + B = 180
6x-18 + 14x+38 = 180
Combine like terms
20x +20 = 180
Subtract 20 from each side
20x+20 -20 =180-20
20x = 160
Divide by 20
20x/20 =160/20
x = 8
