-30=-6+3(d+7)

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Solution for -30=-6+3(d+7) equation: 



-30=-6+3(d+7)

We move all terms to the left:

-30-(-6+3(d+7))=0



We calculate terms in parentheses: -(-6+3(d+7)), so:

-6+3(d+7)

determiningTheFunctionDomain
3(d+7)-6

We multiply parentheses

3d+21-6

We add all the numbers together, and all the variables

3d+15

Back to the equation:

-(3d+15)



We get rid of parentheses

-3d-15-30=0

We add all the numbers together, and all the variables

-3d-45=0

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

-3d=45

d=45/-3

d=-15

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