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## Homework Statement

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.

## Homework Equations

## 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.