Question 1184094
Let B = amount Alice spent on the book.


Step 1.  {{{B - ((1/8)B + 6) = (7/8)B - 6}}}


Step 2. {{{ red(((7/8)B - 6)) - ((2/3)red(((7/8)B - 6))+ 12) = 35}}}


Step 3.  Solve for B.  

{{{(7/24)B - 14 = 35}}} ===> B = ${{{green(168)}}}