7r+84=-5r

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Solution for 7r+84=-5r equation: 



7r+84=-5r

We move all terms to the left:

7r+84-(-5r)=0

We get rid of parentheses

7r+5r+84=0

We add all the numbers together, and all the variables

12r+84=0

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

12r=-84

r=-84/12

r=-7

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