Answer:
I don't really know how to solve this problem -- see my explanation for setup -- I hope this helps.
Step-by-step explanation:
To find [tex]mDAB[/tex], we basically need to find [tex]mDCB[/tex]and subtract that from 360° (The full circle).
Given: [tex]mDC=12x+7[/tex] ,[tex]mCB=18x-23[/tex]
