HELP! What is the value of x that will make A parallel to B? WILL GIVE BRAINLIEST!

Answer:
The answer to your question is: x = 10
Step-by-step explanation:
They are correspondent angles so, they measure the same
4x = 3x + 10
4x - 3x = 10
x = 10
4x = 4(10) = 40° 3(10) + 10 = 40°