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-5.1-r=6.5
We move all terms to the left:
-5.1-r-(6.5)=0
We add all the numbers together, and all the variables
-1r-11.6=0
We move all terms containing r to the left, all other terms to the right
-r=11.6
r=11.6/-1
r=-11+0.6/1
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