Answer:
mAngle A= 132 degrees
Step-by-step explanation:
a = 5x-18. b= 3x+42
a=b because they are alternate interior
5x-18=3x+42
combine like terms
SUbtract 3x from both sides and add 18 to both sides
2x=60
divide by 2
x = 30
Now plug in 30
5(30)=150
150-18=132
