-18=9(8d+7)

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Solution for -18=9(8d+7) equation: 



-18=9(8d+7)

We move all terms to the left:

-18-(9(8d+7))=0



We calculate terms in parentheses: -(9(8d+7)), so:

9(8d+7)

We multiply parentheses

72d+63

Back to the equation:

-(72d+63)



We get rid of parentheses

-72d-63-18=0

We add all the numbers together, and all the variables

-72d-81=0

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

-72d=81

d=81/-72

d=-1+1/8

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