1. The problem statement, all variables and given/known data I am apparently missing a few details from the process of solving this... This is a question from the chapter 1.1 basic equations of the text book 'Algebra and trigonometry' The question is: r-2[1-3(2r+4)] = 61 I am supposed to isolate the variable and find the value of r. 2. Relevant equations 3. The attempt at a solution I tried to simplify the left hand side of the equation, then attempted to isolate the variable. The answer is apparently '3' Also, what is a good process to study? I am right now teaching myself algebra and trigonometry. Any tips about the studying process will be greatly appreciated.