Lines a and b are parallel. What is the value of x? (I will mark brainliest) (please hurry)
A. 5
B. 10
C. 35
D. 55

Answer:
A.5
Step-by-step explanation:
11x+7x+90=180
11x and the unlabeled angle in the triangle are alt. interior and are equal
18x=90
divide both sides by 18
x=5