'The thing is that your solution is the algebraic solution'
I agree. That's why I said
'Really, the trick mention(ed) ... is just a rephrasing of the algebra'
Just because you do number juggling in your head rather than write it formulaically doesn't make it an inferior technique, or make it not algebra, which was my point.
I agree. That's why I said
'Really, the trick mention(ed) ... is just a rephrasing of the algebra'
Just because you do number juggling in your head rather than write it formulaically doesn't make it an inferior technique, or make it not algebra, which was my point.