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-8-4r=-(8+8r)
We move all terms to the left:
-8-4r-(-(8+8r))=0
We add all the numbers together, and all the variables
-4r-(-(8r+8))-8=0
We calculate terms in parentheses: -(-(8r+8)), so:We get rid of parentheses
-(8r+8)
We get rid of parentheses
-8r-8
Back to the equation:
-(-8r-8)
-4r+8r+8-8=0
We add all the numbers together, and all the variables
4r=0
r=0/4
r=0
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