r+(-4)=12

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Solution for r+(-4)=12 equation: 



r+(-4)=12

We move all terms to the left:

r+(-4)-(12)=0

determiningTheFunctionDomain
r-12+(-4)=0

We add all the numbers together, and all the variables

r-16=0

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

r=16

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