Answer:
36°.
Step-by-step explanation:
According to the question, m∠ABD is a straight angle. This means that it is a 180 degree angle.
m∠CBD and m∠ABC add up to make the straight angle, so the two measures add to be 180 degrees.
(8x + 16) + (6x - 60) = 180
8x + 6x + 16 - 60 = 180
14x - 44 = 180
14x = 224
x = 16
m∠ABC = 6x - 60
6 * 16 - 60 = 96 - 60 = 36
So, m∠ABC = 36°
Hope this helps!
