9r+1=r-7

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



9r+1=r-7

We move all terms to the left:

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

We get rid of parentheses

9r-r+7+1=0

We add all the numbers together, and all the variables

8r+8=0

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

8r=-8

r=-8/8

r=-1

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