absolute value problem

|13|-7x|-2+8|/6 =
13-7x10/6
am I on the right track?

Nope. Treat || like parentheses for grouping. Then, when everything inside has been evaluated, apply the absolute value:

|13|-7x|-2+8|/6
13-7x|6|/6
13-7x6/6
13-7x1
6