r-(-18)=3

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Solution for r-(-18)=3 equation: 



r-(-18)=3

We move all terms to the left:

r-(-18)-(3)=0

determiningTheFunctionDomain
r-3-(-18)=0

We add all the numbers together, and all the variables

r+15=0

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

r=-15

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