3r-(-1)=7

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Solution for 3r-(-1)=7 equation: 



3r-(-1)=7

We move all terms to the left:

3r-(-1)-(7)=0

determiningTheFunctionDomain
3r-7-(-1)=0

We add all the numbers together, and all the variables

3r-6=0

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

3r=6

r=6/3

r=2

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