-84+6r=-8r

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Solution for -84+6r=-8r equation: 



-84+6r=-8r

We move all terms to the left:

-84+6r-(-8r)=0

We get rid of parentheses

6r+8r-84=0

We add all the numbers together, and all the variables

14r-84=0

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

14r=84

r=84/14

r=6

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