9r-1=-7+3r

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Solution for 9r-1=-7+3r equation: 



9r-1=-7+3r

We move all terms to the left:

9r-1-(-7+3r)=0

We add all the numbers together, and all the variables

9r-(3r-7)-1=0

We get rid of parentheses

9r-3r+7-1=0

We add all the numbers together, and all the variables

6r+6=0

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

6r=-6

r=-6/6

r=-1

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