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1-6r=-3r-8
We move all terms to the left:
1-6r-(-3r-8)=0
We get rid of parentheses
-6r+3r+8+1=0
We add all the numbers together, and all the variables
-3r+9=0
We move all terms containing r to the left, all other terms to the right
-3r=-9
r=-9/-3
r=+3
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