-6=-3(d-7)

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



-6=-3(d-7)

We move all terms to the left:

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



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

-3(d-7)

We multiply parentheses

-3d+21

Back to the equation:

-(-3d+21)



We get rid of parentheses

3d-21-6=0

We add all the numbers together, and all the variables

3d-27=0

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

3d=27

d=27/3

d=9

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