HELP! What is the value of x that makes A parallel to B?

Answer:
15
Step-by-step explanation:
check out the pic and tell me if you need further explanation
Answer:
x = 15.
Step-by-step explanation:
If they are parallel then < 2 + < 4 = 180 degrees.
Then 2x + 10 + 4x + 80 = 180
6x = 180 - 10 - 80 = 90
x = 90/6
x = 15.