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-6+r-8-4r=-1-4r-7
We move all terms to the left:
-6+r-8-4r-(-1-4r-7)=0
We add all the numbers together, and all the variables
r-4r-(-4r-8)-6-8=0
We add all the numbers together, and all the variables
-3r-(-4r-8)-14=0
We get rid of parentheses
-3r+4r+8-14=0
We add all the numbers together, and all the variables
r-6=0
We move all terms containing r to the left, all other terms to the right
r=6
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