SOLUTION: Ok here's another for whoever can help me help my daughter r+s+[-(r+s+t)]

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Question 211050This question is from textbook structure and method
: Ok here's another for whoever can help me help my daughter
r+s+[-(r+s+t)]This question is from textbook structure and method

Answer by Alan3354(21598) About Me  (Show Source):
You can put this solution on YOUR website!
r+s+[-(r+s+t)]
= r+s +[-r-s-t]
= r+s -r-s-t
= -t
--------