r-(-1)=19

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Solution for r-(-1)=19 equation: 



r-(-1)=19

We move all terms to the left:

r-(-1)-(19)=0

determiningTheFunctionDomain
r-19-(-1)=0

We add all the numbers together, and all the variables

r-18=0

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

r=18

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