r-(-8)=7

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Solution for r-(-8)=7 equation: 



r-(-8)=7

We move all terms to the left:

r-(-8)-(7)=0

determiningTheFunctionDomain
r-7-(-8)=0

We add all the numbers together, and all the variables

r+1=0

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

r=-1

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