SOLUTION: Hello I need help on this question, please explain -[a+{a-(a-x)-(a+x)-a}-a]

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Question 1047484: Hello I need help on this question, please explain
-[a+{a-(a-x)-(a+x)-a}-a]

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

-%28a%2B%28a-%28a-x%29-%28a%2Bx%29-a%29-a%29....first eliminate parentheses inside, recall if in front of parentheses minus sign means signs inside will change
-%28a%2B%28a-a%2Bx-a-x-a%29-a%29
-%28a%2B%28cross%28a%29-cross%28a%29%2Bcross%28x%29-a-cross%28x%29-a%29-a%29
-%28a%2B%28-a-a%29-a%29
-%28a%2B%28-2a%29-a%29
-%28cross%28a%29-2a-cross%28a%29%29
-%28-2a%29
2a