-9r-4=-84

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Solution for -9r-4=-84 equation: 



-9r-4=-84

We move all terms to the left:

-9r-4-(-84)=0

We add all the numbers together, and all the variables

-9r+80=0

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

-9r=-80

r=-80/-9

r=8+8/9

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