9=-9(d+91)

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Solution for 9=-9(d+91) equation: 



9=-9(d+91)

We move all terms to the left:

9-(-9(d+91))=0



We calculate terms in parentheses: -(-9(d+91)), so:

-9(d+91)

We multiply parentheses

-9d-819

Back to the equation:

-(-9d-819)



We get rid of parentheses

9d+819+9=0

We add all the numbers together, and all the variables

9d+828=0

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

9d=-828

d=-828/9

d=-92

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