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-r+6=-2r-4
We move all terms to the left:
-r+6-(-2r-4)=0
We add all the numbers together, and all the variables
-1r-(-2r-4)+6=0
We get rid of parentheses
-1r+2r+4+6=0
We add all the numbers together, and all the variables
r+10=0
We move all terms containing r to the left, all other terms to the right
r=-10
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