-54=-9(r+81)

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Solution for -54=-9(r+81) equation: 



-54=-9(r+81)

We move all terms to the left:

-54-(-9(r+81))=0



We calculate terms in parentheses: -(-9(r+81)), so:

-9(r+81)

We multiply parentheses

-9r-729

Back to the equation:

-(-9r-729)



We get rid of parentheses

9r+729-54=0

We add all the numbers together, and all the variables

9r+675=0

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

9r=-675

r=-675/9

r=-75

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