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-8r=-2r-6r
We move all terms to the left:
-8r-(-2r-6r)=0
We add all the numbers together, and all the variables
-8r-(-8r)=0
We get rid of parentheses
-8r+8r=0
We add all the numbers together, and all the variables
=0
r=0/1
r=0
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