Answer:
x=65°
Step-by-step explanation:
Here we are given a pair of parallel lines and a transversal line intersecting at two points.
We know that the alternate interior angles are equal to each other
please refer to the attached file. Here we see that D=J
and D=x+15
Hence x+15=80
subtracting 15 from both sides we get
x=80-15
x=65
Hence our answer is x=65°
