15-7d=-3(6d+9)

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Solution for 15-7d=-3(6d+9) equation: 



15-7d=-3(6d+9)

We move all terms to the left:

15-7d-(-3(6d+9))=0



We calculate terms in parentheses: -(-3(6d+9)), so:

-3(6d+9)

We multiply parentheses

-18d-27

Back to the equation:

-(-18d-27)



We get rid of parentheses

-7d+18d+27+15=0

We add all the numbers together, and all the variables

11d+42=0

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

11d=-42

d=-42/11

d=-3+9/11

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