-7+-7r=-91

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Solution for -7+-7r=-91 equation: 



-7+-7r=-91

We move all terms to the left:

-7+-7r-(-91)=0

We add all the numbers together, and all the variables

-7r+84=0

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

-7r=-84

r=-84/-7

r=+12

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