SOLUTION: Hello, How to solve this problem? z - {2z -[3z -(4z - 5z) - 6z] -7z} - 8z

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Question 499244: Hello,
How to solve this problem?
z - {2z -[3z -(4z - 5z) - 6z] -7z} - 8z
Answer by deborabr(181) About Me  (Show Source):
You can put this solution on YOUR website!
z - {2z -[3z -(4z - 5z) - 6z] -7z} - 8z
z - {2z -[3z -(-z) - 6z] -7z} - 8z
z - {2z -[3z + z - 6z] -7z} - 8z
z - {2z -[-2z]-7z} - 8z
z - {2z + 2z - 7z} - 8z
z - {-3z} - 8z
z + 3z - 8z
4z - 8z
-4z