Solve this equation 6(5-8v) + 12 =-54

Question and answers are in the attached picture. you so much in advance.

Issof claims that the scale factor is 1/2. which statement about his claim is correct

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%