In circle d, angle adc measures (7x + 2)°. arc ac measures (8x - 8)°. what is the measure of angle abc?

Ihad to look for the figure and here is my answer:

based on the given circle d with angles adc and arc ac, here is how we are going to look for the measure of angle abc:
arc ac=angle adc
8x-8=7x+2
8x-7x=2+8
x=10
< adc=7(10)+2=72
< abc=72/2=36
so the answer for this is 36 degrees.

Ibelieve it would be letter c (: