Step-by-step explanation:
plz refer the attachment
The answer should be x=60. ABD are an equilateral triangle all the angles must add up to 180. 60*3=180. Also if you have a protractor you can measure the angle C, the 60 degrees part and measure it against A, D and B. Hope this helps.
-3/5 they have opposite slopes so they would never touch but are parallel.