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-5(r+6)=-81
We move all terms to the left:
-5(r+6)-(-81)=0
We add all the numbers together, and all the variables
-5(r+6)+81=0
We multiply parentheses
-5r-30+81=0
We add all the numbers together, and all the variables
-5r+51=0
We move all terms containing r to the left, all other terms to the right
-5r=-51
r=-51/-5
r=10+1/5
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