Question 1100319
Dear Ikleyn,
You are a smart person. Why are you getting upset? 
Greenestamps was trying to explain why he offered another approach. 
He did NOT say you were wrong. He was just offering a different approach. 

You do the same thing as greenestamps. 
You both offer added comments. 
He offers a different approach than the normal algebraic solutions. 
You offer solutions from your point of view.  
As long as the original solution is correct, there really is no need for an additional solution.
Let's try to get along.
Rich