Answer:
x = 100
Step-by-step explanation:
First find the second angle in the triangle
to do that you do 180-115 = 65
then add 65 + 15 = 80
Since a triangle is 180 degrees you do
180 - 80
which means the final angle (x) is equal to 100 degrees
Here
x+15°=115°(sum of two opposite interior angles is equal to exterior angle)
x=100°
