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-6+r/8=-8
We move all terms to the left:
-6+r/8-(-8)=0
We add all the numbers together, and all the variables
r/8+2=0
We multiply all the terms by the denominator
r+2*8=0
We add all the numbers together, and all the variables
r+16=0
We move all terms containing r to the left, all other terms to the right
r=-16
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