r-(-6)=81

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Solution for r-(-6)=81 equation: 



r-(-6)=81

We move all terms to the left:

r-(-6)-(81)=0

determiningTheFunctionDomain
r-81-(-6)=0

We add all the numbers together, and all the variables

r-75=0

We move all terms containing r to the left, all other terms to the right

r=75

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